There have been a lot of dumb things countries have fought over. You might think entire nations wouldn't have petty disputes like two suburban dads passive-aggressively trying to stick it to their neighbor - let's just see what the Homeowner's Association has to say about that new Ficus, Bob - but you would be wrong. So wrong. Some of the silliest disputes in history have been between two or more countries.
There are plenty of weird reasons countries have gone to war. There have been disputes over the proper ownership of a camel (yes, one camel), soccer hooligans, somewhat unsurprisingly, causing an actual war between El Salvador and Honduras, and golden stools up for grabs. Check out this list of weird historical disputes and vote up the craziest things countries have fought over.