Early and Late Middle Ages question Invasions of Europe by outsiders caused the need and development of .

Feudalism.

Explanation:

When the Roman Empire fell, Germanic invaders began pushing into the territory. The empire had offered them protection, but with many warring kingdoms being established- that protection was not being given. Peasants began offering serfdom in exchange for protection and land. This led to the intricate web of loyalty, vassals, lords, and peasants that we know of today.

explanation:

cause they can

the most famous of all the units fighting in cuba, the "rough riders" was the name given to the first u.s. volunteer cavalry under the leadership of theodore roosevelt. roosevelt resigned his position as assistant secretary of the navy in may 1898 to join the volunteer cavalry. the original plan for this unit called for filling it with men from the indian territory, new mexico, arizona, and oklahoma. however, once roosevelt joined the group, it quickly became the place for a mix of troops ranging from ivy league athletes to glee-club singers to texas rangers and indians.