This is a list of armies arranged by ordinal number.

First Army

• British First Army
• Canadian First Army
• US First Army

• British Second Army
• US Second Army

• British Third Army
• US Third Army

• British Fourth Army
• US Fourth Army

• British Fifth Army
• US Fifth Army

• US Sixth Army

• US Seventh Army

• British Eighth Army
• US Eighth Army

• British Ninth Army
• US Ninth Army

• British Tenth Army
• US Tenth Army

Twelfth Army

• British Twelfth Army

Fourteenth Army

• British Fourteenth Army

• US Fifteenth Army