The Territorial Army was raised by the Britishers in 1920 through Indian Territorial Act of 1920 and it was org into two wings namely – ‘The Auxiliary Force’ for Europeans & Anglo-Indians, and ‘The Indian Territorial Force’ for Indian Volunteers. After Independence Territorial Army Act was passed in 1948 and the Territorial Army was formally inaugurated by the first Indian Governor General Shri C Rajagopalachari on 09 Oct 1949. This date is being celebrated as Prime Minister’s TA Day Parade every year. 

The Territorial Army initially had various types of units such as Armed Regt (TA), Infantry Battalion (TA), Air Defence (TA), Med Regt (TA), Engineers Field Park Coy (TA), Signal Regiment (TA), EME Workshop (TA), Coast Battery (TA), ASC GT Coy (TA), ASC Compo Pl (TA), AMC Field Ambulance (TA), by 1972 these units have either been disbanded or converted to Regular Army except Inf Bn (TA).

The Territorial Army is part of Regular Army and its present role is to relieve the Regular Army from static duties and assist civil administration in dealing with natural calamities and maintenance of essential services in situations where life of the communities is affected or the Security of the Country is threatened and to provide units for Regulars Army as and when required.