What cataclysm occurred that eventually led to the moon's formation?

The cataclysm that occurred eventually leading to the moon’s formation is that the size of the planet mars has hit earth. Cataclysm is being defined as an event that is considered to be violent and that is likely to be in a large scale that occurs in the natural world.

julius caesar turned the roman republic into the roman empire by coming in and taking the "dictator" role during the time of a civil war (elites vs lower classes) winning battles and reputation, then declaring him dictator for life

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which statement best describes the relationship between the fourteenth amendment and the african american civil rights movement?