Opinion of the Court
GIERKE, Judge:A general court-martial composed of officer and enlisted members convicted appellant, contrary to his pleas, of willful disobedience of a superior officer’s command, rape, adultery, indecent assault, attempted indecent assault, committing indecent acts (3 specifications), taking indecent liberties, and wrongfully providing alcoholic beverages to minors (3 specifications), in violation of Articles 90, 120, 80, and 134, Uniform Code of Military Justice, 10 USC §§ 890, 920, 880, and 934, respectively. The adjudged and approved sentence provides for a bad-eon-duct discharge, confinement for 78 months, total forfeitures, and reduction to the lowest enlisted grade. In an unpublished opinion, the Court of Criminal Appeals set aside and dismissed one specification of committing an *248indecent act and all the specifications of providing alcoholic beverages to minors. That court affirmed the remaining findings of guilty, reduced the period of confinement to 65 months, and affirmed the sentence as reassessed.
This Court granted review of the following issue:*
WHETHER THE MILITARY JUDGE COMMITTED PREJUDICIAL ERROR BY UNREASONABLY AND UNILATERALLY DENYING APPELLANT ANY OPPORTUNITY TO PRESENT EVIDENCE FROM A MATERIAL DEFENSE WITNESS ON THE MERITS.
For the reasons set out below, we resolve this issue adversely to appellant.
Facts
The granted issue pertains only to specifications 4, 6, and 7 of Charge III, alleging an indecent assault, an indecent act, and indecent liberties. The victims of those offenses were two teenaged girls, TAW and KMG. Five days before trial, the defense requested that RJC, a teenaged boy residing in the United States, be brought to Germany to testify concerning TAW’s and KMG’s bias against appellant. The written request recites that RJC is a former boyfriend of TAW and KMG; that RJC was returned to the United States after running away from home and hiding in TAWs family quarters; and that the alleged victims hid RJC from his father. The request further recites that appellant assisted RJC’s father in searching for his son; that the alleged victims were aware of appellant’s assistance; and that they “resented his intervention.”
At trial, defense counsel orally proffered evidence that RJC ran away from home three times: in November of 1993 and in January and February of 1994. He further proffered evidence that RJC had a sexual relationship with TAW and KMG, in order “to show the depth of the relationship which would help to show bias.” The military judge denied the defense request to compel the appearance of RJC on the ground that it was untimely, that the proffered evidence was irrelevant, that some of it was inadmissible under Mil.R.Evid. 412, Manual for Courts-Martial, United States (1995 ed.), and “that it would be a waste of the court’s time to hear the witness if he were here standing outside the courtroom.”
When KMG was cross-examined by defense counsel on the merits, she testified that RJC ran away from home; that he hid in the attic of the building where KMG and her friend JS lived; that she and her friend tried to convince RJC to return home; and that they turned him in to the military police when he would not return voluntarily. JS testified that she and KMG were upset because RJC brought some weapons he had stolen from his father to their house, and that they decided to turn him in.
Discussion
Appellant now contends that the military judge violated his rights to equal and compulsory process and to present evidence of bias. The Government argues that the military judge did not abuse his discretion.
Upon a proper showing of relevance and necessity, an accused is entitled to the production of witnesses. Art. 46, UCMJ, 10 USC § 846; RCM 703(b) and (c)(2), Manual, supra; see United States v. Breeding, 44 MJ 345, 350 (1996) (“A party is entitled to production of witnesses whose testimony “would be relevant and necessary’ to a matter in issue.”); United States v. Williams, 3 MJ 239, 242 (CMA 1977) (“necessary” witnesses must be produced); United States v. Carpenter, 1 MJ 384, 385-86 (CMA 1976) (if witness is “material,” Government must either produce witness or abate proceedings); see also para. 137, Manual for Courts-Martial, United States, 1969 (Revised edition) (“ ‘material evidence’ has the same meaning as ‘relevant evidence’ ”).
Testimony is “necessary” within the meaning of RCM 703(b)(1) “when it is not cumula*249tive and when it would contribute to a party’s presentation of the ease in some positive way on a matter in issue.” ROM 703(b)(1) Discussion; see United States v. Tangpuz, 5 MJ 426, 429 (CMA 1978) (no right to cumulative evidence). Generally, evidence of “other sexual behavior” by a victim of a sexual offense is not admissible. Mil.R.Evid. 412.
Rulings denying requests for production of witnesses are reviewed for abuse of discretion. United States v. Reveles, 41 MJ 388, 393-94 (1995). We hold that the military judge did not abuse his discretion. We agree with the military judge that some of the proffered evidence would be barred by Mil.R.Evid. 412. Furthermore, on its face, the evidence was not necessary because TAW and KMG were available to testify on the same issue. Curiously, defense counsel did not cross-examine TAW or KMG about the possibility of bias based on appellant’s assistance to RJC’s father. Neither did defense counsel make any proffer of testimony by RJC that would have demonstrated TAW’s or KMG’s bias against appellant.
Finally, assuming arguendo that the military judge should have ordered the production of RJC as a witness on the issue of bias, any error was harmless because, at trial, TAW and KMG did not support defense counsel’s theory of bias. To the contrary, they testified that they were upset with RJC for running away; that they tried to talk him into returning; and that when they were unsuccessful, they turned him in to the military police. There simply was no factual basis for asserting that the girls were biased against appellant for attempting to return RJC to his father’s custody, because they had turned RJC in to the police when they were unsuccessful in persuading him to return home.
Decision
The decision of the United States Army Court of Criminal Appeals is affirmed.
Chief Judge COX and Judges CRAWFORD and EFFRON concur.
We also granted review of the issue whether adultery is a lesser-included offense of rape. This issue was resolved against appellant in United States v. Hill, 48 MJ 352 (1997).