The flag of the republic that is invovled in the war.
Democratic Republic Of Vietnam

Khmer Republic

Khmer Rouge

National Front For the Liberation Of South Vietnam

Republic Of Vietnam

United States

They are the combatants of the Cambodia Civil War.
There are, 250 000 FANK TROUPS
~100,000 to 60,000 KHMER ROUGE TROUPS
These are the strengths.
And during the war there are approximately ~600,000 dead and 1,000,000+
casualties.