Which achievement played an important role in pre-columbian mesoamerican civilizations? (1) use of gunpowder (2) production of corn (3) domestication of horses (4) development of sugar plantations

Government powers not provided to the national government in the us constitution but are rather given to the states by the 10th amendment is called?

Which of the following arguments decided the debate over using the atomic bomb against japan in 1945? using the bomb would destroy the armaments still available to japanese forces in japan. using the bomb would demonstrate the power of the united states to the entire world. using the bomb would shorten the war and avoid heavy casualties among invading troops. using the bomb would enable allied forces to invade and take over the japanese mainland

What was the purpose of the u.s navy's convoy system