Idk if my answer were right. I need clarification

islam spread slowly through much of africa through trade and preaching.

it was bribing i think i might be wrong though

the viking voyages took place during the middle ages, which was about this time. 500 to 1350. the viking voyages took place during the middle ages, which was about this time.

the united states broke it's neutrality was the constant german sinking of trading vessels resulting in the loss of lives, one example would be the lusitania.