Tank Battalion was created in 1980.
Tank Battalion happened in 1980.
It depends upon what military you are talking about and what type of tank the battalion utilizes or is it diverse? For a light tank battalion the numbers will be greater than a Main Battle Tank battalion.
Try googling "battalion profiles"
The Lost Battalion was created in 1919.
Hallamshire Battalion was created in 1859.
Telemark Battalion was created in 1993.
Mormon Battalion was created in 1846.
Caracal Battalion was created in 2000.
Mickiewicz Battalion was created in 1937.
Battalion Zośka was created in 1943.
British Battalion was created in 1937.
Dimitrov Battalion was created in 1936.