Question: What did the United States Army use during Operation Peppermint to prevent the Germans from  disrupting the 1944 Normandy Landings?
Sentence (from "Normandy landings"): The Normandy landings (codenamed Operation Neptune) were the landing operations on Tuesday, 6 June 1944 (termed D-Day) of the Allied invasion of Normandy in Operation Overlord during World War II.
Relevant evidence: Yes