How did the navajo code-talkers aid marines in battle?

Why did the united states become involved in the soviet-afghan war? the united states wanted access to the afghan oil fields. the united states wanted to retaliate against the soviet boycott of the 1984 olympics in los angeles. representative charlie wilson convinced congress to fund afghan resistance to soviet influence. president ronald reagan wanted to force the soviets to withdraw from afghanistan.

This was an order issued during the civil war by president lincoln ending slavery in the confederate states

Why did roosevelt support a “europe first” strategy even though it had been japan that had first attacked the united states?