During World War II, Marshall was instrumental in preparing the U.S. Army and Army Air Forces for the invasion of the European continent. Marshall wrote the document that would become the central strategy for all Allied operations in Europe.
Belgium
King Leopold,who treated the colony as a personal estate. He pushed blacks into forced labor to collect rubber for him, as well as other valuable minerals. unlike other imperial powers, Leopold did not invest in the education, and infrastructure of the kingdom, and when he left, the kingdom had a very few elites, and intellectuals.
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Answer: Invasions by Barbarian tribes
The most straightforward theory for Western Rome's collapse pins the fall on a string of military losses sustained against outside forces. Rome had tangled with Germanic tribes for centuries, but by the 300s “barbarian” groups like the Goths had encroached beyond the Empire's borders.