Year: 1955
(When several divisions are made for each side is when the war will begin)


Front Commander: General(USMC) Sean O' Briem
Nations
United States
Commander of the I Corps: Sean O' Brien
II Corps(Only two Corps for now.)
Divisions
Division Commander: Major General George Smith Patton IV
Division: 1st 'Rough Riders' United States Volunteer Cavalry





South Vietnam
Divisions




Australia and New Zealand
Divisions






Front Commander:
Nations
North Vietnam
Divisions




Viet Cong
Divisions
Division Commander Bich van Lu
Division: 97th Mountaineers Division


Soviet Union and China
Divisions


https://en.wikipedia.org/wiki/Formations_of_the_United_States_Army_during_the_Vietnam_War

https://en.wikipedia.org/wiki/People%27s_Army_of_Vietnam#Vietnam_War

History[en.wikipedia.org]
Map of Vietnam[imgur.com]