One way would be how the Vietcong did the Tet offensive against the US military.
Answer:
The Columbian exchange, also known as the Columbian interchange, named after Christopher Columbus, was the widespread transfer of plants, animals, culture, human populations, technology, diseases, and ideas between the Americas, West Africa, and the Old World in the 15th and 16th centuries.The impact was most severe in the Caribbean, where by 1600 Native American populations on most islands had plummeted by more than 99 percent. Across the Americas, populations fell by 50 percent to 95 percent by 1650. The disease component of the Columbian Exchange was decidedly one-sided.
I think its Pakistan and India might be wrong sorry
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<span>The actions of Japan finally forced the United States to enter the war.</span>
Hostile indians, starvation, poor leadership and government