Which country has won the most wars?

Previous Answer: The United States of America. We have the best military in the world.

This all depends on how you classify a "war". But by any classification, it is not the United States, which may or may not currently possess the best army (Again, it depends on what standards you use to judge. Size? Training? Technology? Budget?)

Having been around for only two hundred years, there is no way the United States could compete with the European armies for most wars or battles won.

That all being said, I would wager that it would most probably be France, though I wouldn't be surprised of Britain or Austria held the number one spot.