The US probably became allies with South Vietnam in 1961.
The US became a combatant, part of the allies in 1917.
They left the US alone but later became allies with the US
became allies of Germany
The main allies of the US in World War 1 were Britain, France, and Canada. Mexico refused to join because of tensions over the US occupation of Veracruz, Mexico.
I wouldn't think Cyprus are allies with the US considering the US are allies with Turkey and Turkey with the blessing of the US invaded Cyprus.
creditor
The US main allies are: U.K., Israel, And Australia.
Allies means friends or helpers, The enemy of the US had "allies" too. So, yes.
the French
USA was on the Allies.
The US will need to get allies, first.