Complex sentence: Indian POWs also joined the Indian National Army, which was allied with the Empire of Japan, was raised by a former colonel of British Indian Army (Gen) Mohan Singh but later led by Netaji Subhas Chandra Bose and Rash Bihari Bose.
Split into simpler sentences: Indian POWs also joined the Indian National Army which was allied with the Empire of Japan. It was raised by a former colonel of the British Indian Army (Gen) Mohan Singh, but later led by Netaji Subhas Chandra Bose and Rash Bihari Bose.