The countries that won World War I were the Allies (also called the Entente Powers), mainly: France, the United Kingdom (and the wider British Empire), the United States, and Italy, along with several other allied nations.

The side that lost World War I was the Central Powers, led by Germany, Austria‑Hungary, the Ottoman Empire, and Bulgaria.

If you’d like, I can also break down how the war ended and what happened to the losing empires.