American troops received DU hazard warnings only by the 2003 Iraq war

Evidence

Whereas most Gulf War troops, like Carol Picou, had never even heard of depleted uranium, much less the threat it posed, by 2003 army training manuals insisted that anybody who came within seventy-five yards of any blown-up tank or spent shells had to wear respiratory and skin protection. The manuals also warned that “contamination will make food and water unsafe for consumption.” — Rob Nixon, Slow Violence and the Environmentalism…, 655