How many americans fought and died in the american civil war?

7. how did the early egyptians use the flooding of the nile river to their advantage? they diverted the water to flood their enemy's lands and destroy their crops. they created an easier way to travel to the mediterranean sea and the indian ocean. they established a new water-based athletic event for the ancient olympics in greece. they devised an innovative irrigation system, which created a surplus of food.

Are people more motivated to change from positive or negative experiences, like slavery, womens rights, and any other historical movements/moments? i need factual information, not opinions.

What is one main characteristic of secondary sources intended for academics and students?