A. Emperor Alexander Severus, who was assassinated by his troops after a defeat.
B. Roman Senade, which accepted some army generals as legitimate emperors.
C. Security of the border, which they were supposed to keep. While the were fighting among themselves, they neglected the defenses of the Emprire, resulting in invasions.
D. Crisis, which ended with the Reforms made by Diocletian.
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language is a type which is used in different countries as different aspects
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George Washington is the first president of USA
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Nelson Mandela was a South African leader who was tried for treason by the white South African government. he and seven other leader were sentenced to life imprisonment in 1964, for during to oppose the apartheid regime in his country. He spent the next 28years in Robben Island, South Africans most dreaded prison.