General George Patton led the tank battalion in World War 2 in Italy, France, Germany, and Belgium. The men in battalion both loved and hated him because of his personality and aggressive fighting methods.

The Battalion Commander is in charge of a battalion.

battalion alludes to the number of men therein. battalion commander alludes to the commander of the battalion

The word battalion is a collective noun for a battalion of soldiers or a battalion of photographers.

No, battalion is a noun.