The United States brought over nearly 400,000 prisoners of war during WWII. There were many attempts by soldiers to escape. In fact, officials recorded exactly 2,222 escape attempts during the war. However, there is one that is notorious for it's unexpected hilarity.
In 1944 a group of German soldiers tunneled their way out of a POW camp. They all got caught, but made one massive blunder. Three of the soldiers built a boat and used it in their escape plans. They had seen the Gila River on a map and decided they would sail along it. As those of you from Arizona may know, the river has nearly no water in it. The boat sank in the mud filling the banks and the 3 men were found and turned in.