Answer:
A need to keep the Soviet Union out of Asia .
Explanation:
The rationale for US military involvement in both Korea and Vietnam was practically the same: to stop communist expansion in Asia and avoid the fall of friendly countries into the hands of communist movements, an outcome that would have supposed an advantage for the Soviet Union in the geopolitical chess game of the Cold War bipolar order.
Biological warfare in the form of smallpox allowed Pizarro to conquer the Inca. Smallpox spread quickly through the Americas prior to Pizarro's arrival. ... But the indigenous tribes of the Americas had no such advantage. Smallpox unexpectedly killed Incan emperor Huayna Cupac, leaving the empire in civil unrest and war.
I think the answer is true.
