 Eisenhower joined a convoy when he was still a young Lieutenant Colonel in the Army, and it was just after World War I. And in World War I, the Army learned that they didn't really know very much about how to move trucks across the country. And so the threat of a future war in which they would need to do that led them to organize this convoy across the country. And that experience for Eisenhower was very formative. It took them about two months to get across the country. They were pulling trucks through the mud.