When did the American Revolution end? How do you know that?

I give Brainliest!

Brainliestttme : )why was the launch of sputnik in 1957 important? -most in the u.s. had not thought the soviets were capable of producing satellite technology.- it made clear that the u.s. space program was dominant.- most in the soviet union had not thought the u.s. was capable of launching manned aircraft. -it established the fact that a more dangerous hydrogen bomb could be created.

Why did georgia’s leaders begin the land lottery system following the american revolution

Was the us justified in using the atomic bomb on hiroshima and nagasaki? why or why not?