What are the names of the countries that used tanks in world war 1?

During World War I, the key countries that used tanks were the United Kingdom, France, and Germany. The UK was the first to deploy tanks in battle, introducing them in 1916 at the Battle of the Somme. France developed and utilized their own tank models, such as the Renault FT, while Germany also created armored vehicles, although their use was more limited compared to the Allies. These innovations marked a significant evolution in warfare technology.