Question

How did the US military move troops quickly across the jungle during the Vietnam War?
in bombers
in helicopters
in supply lines
in quick marches

Answer 1

In helicopters.

The US pioneered "airmobile" or "air cavalry" tactics in Vietnam (notably using the Bell UH-1 Huey) to insert, extract and resupply troops rapidly across dense jungle, perform medevac, and conduct vertical envelopment — far faster and more flexible than marches or bombers (bombers weren’t used to transport troops).