European countries were not just competing for colonies, but for military power, too. Many countries—especially Germany—believed that they needed to build up their navies. They did so mainly because they wanted to prevent other countries from attacking them, not because they actually wanted to fight. Even though the leaders of these countries were busy strengthening their militaries, they knew they needed some friends. So they turned to some of their neighboring countries and made military alliances, or agreements, that if another country attacked their friends, they would back their friends and help them fight. There were two major alliances in Europe. France, Britain and Russia were known as the Allied Powers. Other countries that supported the Allied Powers during the war included Serbia, Belgium, Italy, Japan, Greece and Romania. Germany, Austria-Hungary and Italy were known as the Central Powers during the war, though Italy actually ended up joining the other side. Other countries that supported the Central Powers included the Ottoman Empire and the Kingdom of Bulgaria. Which of the following best describes the relationship between the countries of the Allied Powers?