Your going to need to be way more specific, virtually every single war throughout history the way the US military fights has changed. Ex. the technology used, the way the technology is used, the way the Chain of Command works, specific fighting techniques, enlisted roles, officer roles, warrant officer roles (and whether or not the branch had them), deployment methods, airlift methods, politics of war, I could go on all day. To list the changes in the way the military operates from Desert shield to Desert storm could be a book itself.