Depinder Singh was an assistant to the Chief of the Army Staff who had servied in what force during World War II?
Depinder Singh: Lieutenant general Depinder Singh (born 1930, Punjab British India) was the Overall commander of the IPKF in Sri Lanka from July 1987 to March 1990,He was the military assistant to Sam Manekshaw from 1969-73 during the Indo-Pakistani War of 1971. Sam Manekshaw: Field Marshal Sam Hormusji Framji Jamshedji Manekshaw, MC (3 April 1914 – 27 June 2008), popularly known as Sam Bahadur ("Sam the Brave"), was the Chief of the Army Staff of the Indian Army during the Indo-Pakistani War of 1971, and was subsequently the first Indian Army officer to be promoted to the rank of field marshal. Sam Manekshaw:  His distinguished military career spanned four decades and five wars, beginning with service in the British Indian Army in World War II.
British Indian Army