What event happened when world war 1 veterans marched in protest on washington?

Which of the following is a claim about ancient rome that a historian could build san argument around

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.

The event shown in the map is a cause of which of the following? *pic*gadsden purchase battle of the alamo bear flag revolt settlement of texas