An Ally
It means the most powerful individual, group or country on your side.
An ally is one who helps you.someone who is on your side,like in ww2 the people who was on our team basicallyallies are people, groups, or states that have joined in an association for mutual benefit or to achieve some common purpose,
Japan was officially on the same side as the Germans although it was a very unlikely alliance. Thailand was Japan's ally in Asia.
General George S. Patton fought on the side of the Allies during World War II. He made the statement "we fought on the wrong side" in reference to the Soviet Union, a former ally, after the war ended.
Treaty
Cuba was an ally to the US during World War II. But after the war, Cuba became communist and joined on the side of Russia against US. Cuba and Russia were also launched the nuclear threat on the US and Mexico.
According to the Oxford English Dictionary, the definition of ally as a verb is:beneficially combine (a resource or commodity) with; (ally oneself with) side with
France
germany
ALLY
side-kick ally advocate supporter bystander helper assistant friend pal mate coworker team mate