First Army

First Army may refer to:

Germany

• 1st Army (German Empire), a World War I field Army
• 1st Army (Wehrmacht), a World War II field army
• 1st Panzer Army
• 1st Parachute Army (Germany)

Others

• First Army (Australia)
• First Army (Austria-Hungary)
• First Army (United Kingdom)
• First Army (Bulgaria)
• First Canadian Army
• Republic of China New First Army
• First Czechoslovak Army in Slovakia
• First Army (France)
• First Army (Greece)
• First Army (Hungary)
• First Army (Italy)
• First Army (Japan)
• First Army (Ottoman Empire)
• First Polish Army (1920)
• First Polish Army (1944-1945)
• First Army (Romania)
• First Army (Russian Empire)
• First Army (Serbia)
• 1st Red Banner Army (Soviet Union)
• First Army (Turkey)
• First United States Army
• First Army (Yugoslavia)