Question

based on the map, why would american military planners want to invade cambodia?
o to reinforce protection of saigon by creating a buffer zone
o to escalate the war by involving neighboring countries
o to stop the viet cong from using a supply route
o to have exclusive access to the mekong river
done

Explanation:

The Ho Chi Minh Trail was a crucial supply route for the Viet Cong. By invading Cambodia, American military planners aimed to disrupt this supply line. This would weaken the Viet Cong's ability to fight in South Vietnam.

Answer:

to stop the Viet Cong from using a supply route