I would like to know the first recorded case of usage of tank in the Bangladesh war which took place in 1971.
This is the 26th of March during Operation Searchlight, the start of the war. As I suspected, they had tanks and used them from the beginning.
In the 1971 Bangladesh war in the eastern theaters pakistan had 1 armored regiment which consist of 75 US made M24 Chaffee tanks.
Tanks was used in Dakha during operation searchlite on March 25th. Chittagong also saw some tank actions dring the same operation.
During the operation searchlite which started on March 25 to April 10 Pakistani Army used Tanks to reduce the morale of the peoples of East Pakistan.
In the western Theaters, Pakistani tanks met an ill fate during the battle of Longewala. http://en.wikipedia.org/wiki/Battle_of_Longewala