Senses
同盟国/ 同盟國 allied nation
An ally or country that has joined a treaty or alliance; a confederation
同盟国/ 同盟國 Central Powers
The alliance of Germany, Austria-Hungary, and Italy during World War I
同盟国/ 同盟國 Allied Powers
The alliance led by China, the Soviet Union, the United Kingdom, and the United States during World War II, which fought against Germany, Italy, and Japan