The Pentagon [has] released a survey estimating that 26,000 people in the armed forces were sexually assaulted last year, up from 19,000 in 2010. The study, based on a confidential survey sent to 108,000 active-duty service members, was released two days after the officer in charge of sexual assault prevention programs for the Air Force was arrested and charged with sexual battery for grabbing a woman's breasts and buttocks in an Arlington, Va., parking lot. In a separate report ... the military recorded 3,374 sexual assault reports last year, up from 3,192 in 2011, suggesting that many victims continue not to report the crimes for fear of retribution or a lack of justice under the department's system for prosecution. The numbers come as the Pentagon prepares to integrate women formally into what had been all-male domains of combat, making the effective monitoring, policing and prosecuting of sexual misconduct all the more pressing. In 2010, a similar Pentagon survey found that 4.4 percent of active-duty women and fewer than 0.9 percent of active-duty men had experienced sexual assault. Pentagon officials could not explain the jump in assaults of women, although they believed that more victims, both men and women, were making the choice to come forward. In the general population, about 0.2 percent of American women over age 12 were victims of sexual assault in 2010, the most recent year for which data is available, according to the Justice Department's Bureau of Justice Statistics.