Opinion of the Court
CRAWFORD, Judge:Contrary to his pleas, appellant, a chaplain, was convicted at Offutt Air Force Base, Nebraska, of assault and battery (2 specifications), assault with a dangerous weapon (3 specifications), communicating a threat (2 specifications), and kidnapping, in violation of Articles 128 and 134, Uniform Code of Military Justice, 10 USC §§ 928 and 934, respectively. The victims in this case are appellant’s wife, stepson, and stepdaughter. The convening authority approved the sentence imposed by the members of a dismissal; and the then-Court of Military Review affirmed. Upon remand from this Court the now-Court *347of Criminal Appeals again affirmed the findings and sentence. We granted review on the following issue:
WHETHER THE MILITARY JUDGE ABUSED HIS DISCRETION BOTH BY DENYING CERTAIN DEFENSE REQUESTS FOR THE PRODUCTION OF CERTAIN WITNESSES AND BY PERSISTING IN HIS DENIAL OF SAID WITNESSES NOTWITHSTANDING THE WILLINGNESS OF THE DEFENSE TO RELIEVE THE PROSECUTION OF THE EXPENSES ASSOCIATED WITH THEIR APPEARANCE AT TRIAL, THEREBY DEPRIVING APPELLANT OF HIS SIXTH AMENDMENT RIGHT TO EQUAL OPPORTUNITY TO OBTAIN WITNESSES UNDER RCM 703.
We hold that the judge did not abuse his discretion in determining that the defense witnesses were not relevant and necessary, regardless whether travel expenses were to be paid by the Government or by the witnesses themselves.
FACTS
The defense requested 19 witnesses on November 9, 1991; 3 more on December 5, 1991; and 1 more on December 13, 1991. At the session under Article 39(a), UCMJ, 10 USC § 839(a), held on December 18, 1991, the Government revealed that it had approved funding for 12 of the 23 requested witnesses. Asked by the judge whether they wanted to litigate the request for the remaining witnesses, the defense requested, and received, a delay in the proceedings to provide additional justification for these witnesses. On December 20, the defense returned with additional information and requested the opportunity to litigate their request for only 8 of the as-yet-unapproved witnesses. Of these, the judge granted production of but two witnesses.
In summary, the following number of requested witnesses were granted: (a) 3 out of 6 as to military character and duty performance; (b) 9 out of 13 as to peacefulness; (e) none as to truthfulness; and (d) 5 out of 6 as to appellant’s mental state. As we discuss later, 44 MJ at 352, other witnesses testified as to. traits (a) through (c).
The substance of the proffered testimony is set forth in Appellate Exhibit XXXIII as follows:
13. Major (Chaplain) Gustaf Steinhilber ... was assigned with Lieutenant Colonel Breeding in Germany and is aware of the marital problems between LtCol Breeding and his wife. He knew LtCol Breeding from August in 1988 until LtCol Breeding left Germany for his assignment to Offutt Air Force Base, and worked closely with him throughout that time. Chaplain Steinhilber has a background [in] marital and family counseling____ He counseled LtCol Breeding and Elizabeth Breeding concerning their marital problems roughly six times. He will testify concerning LtCol Breeding’s good military character and non-violent nature. He will testify as to Mrs. Breeding’s aggressiveness, her provocative and demanding attitude toward her husband, and LtCol Breeding’s tendency to internalize his frustration with his wife’s behavior. He will testify as to Elizabeth Breeding’s mood swings, rigidity, and tendency to get extremely emotional, all of which [a]ffects her credibility as well as her ability to accurately perceive the events she will be testifying about. He will testify that in his opinion Elizabeth Breeding is prone to exaggeration because she tends to [see] things as black and white, and he therefore has a poor opinion of her character for truthfulness. In the event of a conviction, Chaplain Steinhilber will also be wanted as a witness for sentencing. Chaplain Steinhilber worked with LtCol Breeding for several years and can testify as to LtCol Breeding’s good duty performance as well as his personal observations of the mental suffering endured by LtCol Breeding because of the marital difficulties between himself and Mrs. Breeding. He will testify that LtCol Breeding was in a difficult position while assigned to Germany because he was an Air Force Chaplain on a base comprised primarily of Army personnel, and that LtCol Breeding did a good job under those difficult circumstances____
*34817. Mr. Lewis Burnett, Director of Military Chaplains, Southern Baptist Convention, ... is wanted as a witness during the findings portion of the trial to testify as to LtCol Breeding’s good military character. Mr. Burnett retired from the Army as a Colonel after serving a lengthy career as an Army Chaplain. He became Director of Military Chaplains for the Southern Baptist Convention in February 1986 and received quarterly reports from Chaplain Breeding. He has met LtCol Breeding approximately six times and h[a]s met Elizabeth Breeding several times. He is aware of the marital problems of the accused in Germany and is therefore uniquely qualified to testify as to LtCol Breeding’s good military character, truthfulness, and non-violent nature. The accused will offer testimony that his wife threatened to divorce him and used this threat to blackmail him, and Mr. Burnett will testify as to the immense pressure a Chaplain would be under in such circumstances because of the possibility that the church would revoke the Chaplain’s credentials. In the event of a conviction, this witness will be wanted for sentencing. He will testify that competition for appointments as a Southern Baptist Chaplain are extremely competitive and that LtCol Breeding was selected because of his qualifications and professionalism. He will testify that he believes LtCol Breeding can return to service as a chaplain____
19. Ms. Susan Breeding Herrin ... will testify she is the accused’s sister and is two years younger than him. She will testify that she and LtCol Breeding were raised together and attended college together. She will testify she has maintained frequent contact with her brother since his entry into the military, usually visiting him twice a year. She has also maintained contact by telephone and mail. She will testify as to the accused’s character for peacefulness, his non-violent nature, her opinion as to his truthfulness, and his reputation as to his truthfulness. Ms. Herrin will also testify that she has observed Elizabeth Breeding and that Mrs. Breeding spent a week with her in July of 1990. She will testify Mrs. Breeding is extremely volatile and aggressive, and that although Mrs. Breeding provoked her husband on many occasions, LtCol Breeding never lost his temper. In the event of a conviction, Mrs. Herrin will testify as to the stress caused by LtCol Breeding’s first divorce, the emotional trauma caused by the death of LtCol Breeding’s father last year, and the trauma caused by the imminent death of his mother. She will testify her brother is hardworking, unselfish and dedicated to being a minister. She will also testify as to statements made by the accused’s mother concerning the accused’s character for truthfulness and non-violence, and the defense will offer those statements under the excited utterance and residual hearsay exceptions____
20. Chaplain, Colonel Benjamin Perez ... is requested as a witness on findings and will testify as to the accused’s good military character. Col Perez was a chaplain assigned to [¶] USAFE/HC while LtCol Breeding was stationed in Germany; he had previously been on the faculty of the Air Force Chaplain’s school and knew the accused in that capacity as well. He has known the accused since the early 1980s. In the event of a conviction, Chaplain Perez will be wanted as a sentencing witness....
21. Chris Smith ... is requested as a witness at trial. He will testify he lived in West Germany at the time the accused and his family lived there; that he was a friend of the accused’s children and step-children; that Elizabeth Breeding has a quick and violent temper and is given to emotional outbursts; that on two occasions Mrs. Breeding attacked her son Ryan with the result that he (Mr. Smith) was required to separate the two of them; that Mrs. Breeding constantly yelled at her husband regarding his alleged failure to discipline the children and constantly put him down in public, and that LtCol Breeding never lost his temper in those circumstances.
22. Dr. Gayle Dean ... is the father of Elizabeth Breeding. He is requested as a witness for findings; he has observed the accused with his family and because of his *349credentials and knowledge of his daughter’s character is uniquely qualified to testify as to LtCol Breeding’s peacefulness and truthfulness____
The judge made the following findings as to the defense request for the production of witnesses:
Defense has failed to establish that Mr. Burnett has had sufficient contact with the accused to testify as to the accused’s military character, truthfulness or nonviolent nature. His testimony as to the impact of any conviction as related in Appellate Exhibit [X]XXIII appears to be tangential to this trial and not a direct and immediate result of conviction; it’s speculative on the witness’ part. Speculative in the sense that a witness could only testify as to apparently what the process would be and not what the outcome would be.
I decline to direct the Government to produce Colonel Perez. I believe his testimony is cumulative with other witnesses who will or will be [sic] produced or are going to be produced and that he does not have a sufficient basis for a number of things that defense counsel indicates he’ll testify to. I also decline to direct the Government to produce Susan Herrin. She also lacks sufficient contact as far as her testimony oh the merits and some of the things that she would testify are cumulative with other witnesses who will be called or that I will direct be called. In regards to her sentencing information, the trial counsel said he’s willing to stipulate as a matter of fact. I believe the credibility of this witness is not an issue and that there are other means available by which her testimony can be introduced into the trial. I don’t believe the significance of her testimony outweighs the cost involved in transporting her from Tennessee.
Also, I decline to direct the Government to produce Mr. Dean or Dr. Dean. I believe that his testimony is cumulative with other testimony of witnesses who will be called or that I will direct to be called. I’ve read his letter, and it doesn’t really appear to have anything to say that pertains — that’s relevant to this case and admissible.
In regards to Major Steinhilber and Mr. Mike Green, I will direct that one of them be brought. That is for the defense counsel to decide which one. I believe both individuals, from the proffer made by the defense, can have testimony as far as the military duty performance of the accused [at] the time he was stationed in Germany. In addition, both individuals have testimony as far as the peacefulness or lack thereof of Mrs. Breeding____
I will not direct that he [Mr. Chris Smith] be brought; however, apparently his testimony only pertains to the peacefulness or lack thereof of Mrs. Breeding. However, if that character, if we can call it a character trait, becomes relevant during the trial, such as a defense of self-defense, I will reconsider — I will reconsider the ruling based on a defense counsel request. I would suggest that if you’re going to raise self-defense as a defense that you tell me in a timely manner so that Mrs. Smith can be — excuse me, Mr. Smith can be brought. And I would point out that Mr. Smith’s testimony is cumulative with some of the other testimony on that trait who are going to testify, that is, the wife’s aggressiveness or nonaggressiveness.
DISCUSSION
“The standard of review for rulings denying requests for production of witnesses is abuse of discretion.” United States v. Reveles, 41 MJ 388, 393-94 (1995). Requests for production of witnesses are governed by procedural and evidentiary rules set out infra.
Procedural Rules. RCM 703, Manual for Courts-Martial, United States (1995 ed.), is *350the procedural rule governing production of witnesses. A party is entitled to production of witnesses whose testimony “would be relevant and necessary” to a matter in issue. RCM 708(b)(1). According to RCM 703(c)(2)(B)(i), the defense must set forth a “synopsis of the expected testimony sufficient to show its relevance and necessity.” Although this Rule does not define relevance, its discussion does state that evidence is “necessary when it is not cumulative and when it would contribute to a party’s presentation of the case in some positive way on a matter in issue.” See, e.g., United States v. Credit, 8 MJ 190, 193 (CMA 1980); United States v. Williams, 3 MJ 239 (CMA 1977).
Evidentiary Rules. As to the definition of relevance found in RCM 703, we must examine Section IV of the Military Rules of Evidence. The definitions of logical and legal relevance are found in Mil.R.Evid. 401-403, Manual, supra. The specific rules concerning relevance as it relates to character evidence are found in Mil.R.Evid. 405(a) and (d), which provide:
(a) Reputation or opinion. In all cases in which evidence of character or a trait of character of a person is admissible, proof may be made by testimony as to reputation or by testimony in the form of an opinion....
(d) Definitions. “Reputation” means the estimation in which a person generally is held in the community in which the person lives or pursues a business or profession. “Community” in the armed forces includes a post, camp, ship, station, or other military organization regardless of size.
Reputation Evidence. Whether reputation evidence is admissible under Mil. R.Evid. 405 depends upon the witness’ being a member of appellant’s military community, i.e., “a post, camp, ship, station, or other military organization regardless of size.” Mil.R.Evid. 405(d). As this Court stated in United States v. Reveles, 41 MJ at 395: “The definition of ‘community’ ... is inclusive rather than restrictive.”
We noted in United States v. Toro, 37 MJ 313, 317 (CMA 1993), the following as to character traits:
The proponent must show that the character witness who will testify as to the witness’ reputation resides or works in the same community as the witness and has lived or worked in the community long enough to have become familiar with the witness’ reputation in the community.
It is not enough to show that the witness was a member of the community. It must be shown that the witness worked or resided “in the same community ... long enough to have” formed an opinion or to have heard of appellant’s or his "wife’s reputation in the community. United States v. Toro, 37 MJ at 317; see also Michelson v. United States, 335 U.S. 469, 69 S.Ct. 213, 93 L.Ed. 168 (1948).
Reputation evidence will reveal how an individual is known in the community. Reputation is what the witnesses have heard about appellant or his wife, whereas opinion evidence relates to their own personal observations and experiences with appellant and his wife. Thus, the witness must be or have been sufficiently acquainted with the person living and working in the community and the circles in which he moved that he could speak with authority as to appellant’s or his wife’s reputation there.
Opinion Evidence. Opinion evidence differs from reputation evidence as to its foundational requirements. The witness need not be a member of the community or unit to have known appellant long enough to have formed an opinion as to his character, whereas reputation-type evidence is a summary as to how an individual is known in the community or unit. As we stated in United States v. Toro, 37 MJ at 317:
To lay a proper foundation for opinion evidence, the proponent must show that the character witness personally knows the witness and is acquainted with the witness well enough to have had an opportunity to form an opinion of the witness’ character for truthfulness.
*351ROM 703(c)(2)(B)(i), in conjunction with Mil.R.Evid. 405, is satisfied by setting forth: (1) the name of the witness; (2) whether the witness was a member of the same community or unit as appellant; (3) how long the witness has known appellant; (4) whether the witness knew appellant or his wife in a professional or social capacity; (5) the character trait known; and (6) a summary of the testimony about it. None of the defense requests at trial gave all of this information to the convening authority or the military judge.
Proffered Character Witnesses
The judge did not abuse his discretion in refusing to subpoena Major Steinhilber. The proffer did not establish that he knew appellant long enough to have formed an opinion as to appellant or to have heard of his reputation in the community. Additionally, as to the wife’s aggressiveness, the fact that Major Steinhilber interviewed them “roughly six times,” with no indication as to the length or the intensity of the interviews, would not be sufficient contact to require him to be subpoenaed as a relevant and necessary witness. United States v. Ingham, 42 MJ 218, 225 (1995) (chaplain’s interviews with appellant’s wife were not sufficient for him to testify as to her truthfulness); United States v. Farrar, 28 MJ 387, 388, 390 (CMA 1989) (no abuse of discretion in prohibiting a drug-abuse counselor, who was involved in “an intensive 3-hour one-on-one interview with” the accused, from testifying as to her truthfulness); United States v. Williams, 26 MJ 487, 489, 490 (CMA 1988) (harmless error to allow defense witness who conducted two interviews with the victim, which lasted only a total of one and a half hours, to testify on cross-examination as to the victim’s “truthfulness”); United States v. Perner, 14 MJ 181, 184-85 (CMA 1982) (harmless error for hospital corpsmen, who had seen appellant’s wife on several occasions, to testify as to her credibility); see also United States v. Jenkins, 27 MJ 209, 211 (CMA 1988) (no abuse of discretion in prohibiting individual, who performed four or five marriage counseling sessions, from testifying as to Jenkins’ good character).
Likewise, the judge did not abuse his discretion in refusing to require the subpoena of Mr. Burnett. He was never a member of appellant’s community or unit and never knew appellant long enough to form an opinion about him. The proffer was that he had met both appellant and his wife “approximately six times.” These meetings at conferences would not have enabled him to testify as to appellant’s good military character, truthfulness, or peacefulness. As to the pressure on a chaplain because of these accusations, that testimony was not necessary because it was cumulative with the proffered testimony of other witnesses.
The defense proffer as to Ms. Susan Breeding Herrin was not sufficient to show that her testimony was relevant and necessary. While she was raised with appellant and attended college with him, this was more than 20 years ago. The types of contact she had maintained since then were not sufficiently spelled out for us to hold that there was an abuse of discretion in not allowing her to testify.
The judge did not abuse his discretion in refusing to subpoena Doctor Gayle Dean, Jr., appellant’s father-in-law. His knowledge concerning the interaction between appellant and his wife was based on spending 3 weeks with them more than 4 years earlier.
As to the last witness, Chris Smith, again a proper proffer was not made to establish the relevance and necessity of his testimony.
The judge recognized that there might be “further argument after I make my decision, because we’re not talking about one or two witnesses here. But it would have to be very persuasive to change my mind.” Cf. United States v. Brannan, 18 MJ 181 (CMA 1984); United States v. Thomas, 11 MJ 388, 392 (CMA 1981).
Even where witnesses are going to appear voluntarily, the judge serves as a gate keeper to ensure that their testimony is rele*352vant and not cumulative.* See Daubert v. Merrell Dow Pharmaceuticals, Inc., 509 U.S. 579, 597, 113 S.Ct. 2786, 2798-99, 125 L.Ed.2d 469 (1993).
United States v. Harmon, 40 MJ 107, 108 (CMA 1994), recognized the constitutional right of the defense to call "witnesses and to determine which witnesses they want to call. But we also recognized that the judge has discretion to determine which witnesses are cumulative and to exclude them.
The character traits at issue in this case in terms of the excluded six witnesses concern appellant’s good military character, peacefulness, truthfulness, and his wife’s aggressiveness. We are satisfied that the proffered testimony of the six witnesses was cumulative with other witnesses at trial.
Good Military Character. Colonel (Chaplain) Rhyne, Pastor Rittenhouse, and Colonel (Chaplain) Singletary, testified at trial as to appellant’s good military character.
The defense also requested First Lieutenant Gary Mitchell, Master Sergeant Dennis Murray, and Mr. Michael Greene to testify as to appellant’s good military character. Mitchell and Greene were subpoenaed and testified on peacefulness but the defense did not ask about good military character, therefore waiving the issue.
As to peacefulness, Rhyne, Mitchell, Greene, and Barbara Morris testified as to appellant’s peacefulness and all but Mitchell as to his wife’s aggressiveness. A number of other witnesses also testified as to his wife’s aggressiveness.
As to truthfulness, until there was a commitment that the defendant would testify, appellant’s truthfulness was not in issue. In any event, evidence as to truthfulness is not relevant until a witness testifies and his or her credibility is attacked. United States v. Robertson, 39 MJ 211, 217 (CMA 1994); United States v. Everage, 19 MJ 189, 192-93 (CMA 1985). Thus, the defense would have had to renew their request for witnesses to testify as to truthfulness after the defendant testified. The defense did not do so.
In conclusion, we hold that the proffered testimony of the six excluded witnesses was insufficient to establish these witnesses as relevant and necessary.
The decision of the United States Air Force Court of Criminal Appeals is affirmed.
Chief Judge COX, Judge GIERKE, and Senior Judge EVERETT concur.I suggest that the same rules will apply as to relevance and necessity when a witness appears voluntarily. But a trial counsel should willingly give the defense counsel a subpoena where the witness will appear voluntarily and needs the subpoena to assure an employer that he or she will be a witness.