What did the U.S. do differently in the Philippines in the early 1900s compared to Vietnam in 1960s-1970s? What was the main problem in Vietnam in terms of the U.S. counterinsurgency effort?

by bigboysonly1

Im reading a lot on both of these topics and I'm curious on a historical background on the key successes and errors in both the Philippines in early 1900s and Vietnam n 1960s-1970s. Many thanks.

Bernardito