The oldest regiment of IA - 1 Para - traces its origin to Madras Presidency Army.
After Siraj-ud-daulla captured Fort William in Calcutta, Clive came with the Madras Army to Bengal via Sea and fought Plassey.
Wellington led the Madras Army to defeat Tipu and then the Marathas.
The Bengal Army fought in Punjab and Afghanistan and brought back the Somnath Gates from Ghazni.
Bombay Army was stunted by the Marathas, but went on to conquer Sindh & Baluchistan.
The oldest continuously existent force - Bombay Marines - was established 1612. The Bombay Marines morphed into Mumbai Police. The old 70's Bollywood movies depict Bombay Police in Navy Blue Uniform and Shorts, that came from the Maritime duties. While uniforms were changed to Khaki, the blue cap still remainshttp://media.new.mensxp.com/media/conte ... 80x457.jpg
All Services have quotas from all states based on latest census for other ranks. That is how Ladakhis end up in IN and learn swimming at INS Chilka.
11 & 12 Battalion, Mahar Regiment have Bengali, Oriya & Gujarati composition. Kumaon Regiment has a battalion from Vidarbha in Central India.
Rest assured, no community is short of patriots, or short sighted leaders