Second Army

• 2nd Army (Austria-Hungary)
• 2nd Army (German Empire)
• 2nd Army (Kingdom of Yugoslavia)
• 2nd Army (RSFSR)
• 2nd Army (Russian Empire)
• 2nd Army (Wehrmacht)
• 2nd Guards Army
• 2nd Guards Tank Army
• 2nd Panzer Army
• 2nd Red Banner Army
• II Army (Argentina)
• II Corps (disambiguation)
• Second Army (Australia)
• Second Army (Bulgaria)
• Second Army (Egypt)
• Second Army (France)
• Second Army (Home Forces)
• Second Army (Hungary)
• Second Army (Italy)
• Second Army (Japan)
• Second Army (Ottoman Empire)
• Second Army (Poland)
• Second Army (Romania)
• Second Army (Serbia)
• Second Army (Turkey)
• Second Army (United Kingdom)
• Second Army Corps (Spanish-American War)
• Second United States Army