Complex sentence: It was revived under the leadership of Subhas Chandra Bose after his arrival in South-East Asia in 1943 and proclaimed the army of Bose's "Arzi Hukumat-e-Azad Hind" (the Provisional Government of Free India).
Split into simpler sentences: It was revived under the leadership of Subhas Chandra Bose after his arrival in Southeast Asia in 1943. The army was declared to be the army of Bose's "Arzi Hukumat-e-Azad Hind" (the Provisional Government of Free India).