WASHINGTON (AP) — Fabian Barrera found a way to make fast cash in the Texas National Guard, earning roughly $181,000 for claiming to have steered 119 potential recruits to join the military. But the bonuses were ill-gotten because the former captain never actually referred any of them.

Barrera's case, which ended last month with a prison sentence of at least three years, is part of what Justice Department lawyers describe as a recurring pattern of corruption that spans a broad cross section of the military.

In a period when the nation has spent freely to support wars on multiple fronts, prosecutors have found plentiful targets: defendants who bill for services they do not provide, those who steer lucrative contracts to select business partners and those who use bribes to game a vast military enterprise.

Despite numerous cases that have produced long prison sentences, the problems have continued abroad and at home with a frequency that law enforcement officials consider troubling.

"The schemes we see really run the gamut from relatively small bribes paid to somebody in Afghanistan to hundreds of millions of dollars' worth of contracts being steered in the direction of a favored company who's paying bribes," Assistant Attorney General Leslie Caldwell, head of the Justice Department's criminal division, said in an interview.

In the past few months alone, four retired and one active-duty Army National Guard officials were charged in a complex bribery and kickback scheme involving the awarding of contracts for marketing and promotional materials.