They were prepared for war. They were prepared to die for their country. But Fort Carson soldiers say they weren't prepared to come home and fight a different battle -- addiction to illegal drugs.

Many of this country's bravest men and women who volunteered to defend America in a time of war have come home wounded -- physically and mentally -- and are turning to illicit drugs as they adjust to normal life, according to soldiers, health experts and advocates.

"Lots of soldiers coming back from Iraq have been using drugs," said Spc. William Swenson, who was deployed to Iraq from Fort Carson. "Right when we got back, there were people using cocaine in the barracks; there were people smoking marijuana at strip clubs; one guy started shooting up," he said.

ABC News spoke to more than a dozen soldiers who described widespread abuse of illegal drugs at Fort Carson by service members back from the war.