Complex sentence: The biggest achievement of Indira Gandhi after the 1971 election came in December 1971 with India's decisive victory over Pakistan in the liberation war, that led to the formation of independent Bangladesh.She was hailed as Goddess Durga by opposition leader Atal Bihari Vajpayee at that time.
Split into simpler sentences: The biggest achievement of Indira Gandhi after the 1971 election was India's decisive victory in the Indo-Pakistani War of 1971, that led to the formation of independent Bangladesh. Some sources claim she was hailed as Goddess Durga by opposition leader Atal Bihari Vajpayee at that time.