How did African Americans contribute to the American revolution?

What lands were added to the russian empire under ivan iv, peter the great, and catherine the great?

He u. s. constitution (1787) establishes a national legislature with powers to “create national law”, a national executive with the power to “enforce national law”, and a national judiciary branch with the power to “interpret national and state policies” to see whether or not they violate the national constitution. this term describes the division of governmental authority into semi-independent bodies?

Aclaim about history is most likely not valid if it has which of these characteristics?