Bengal deadliest recorded cyclones. West Bengal became one of India's most populous states. Calcutta, the former capital of the British Raj, became the state capital of West Bengal and continued to be India's largest city until the late 20th century, when severe power shortages, strikes and a violent Marxist-Naxalite movement damaged much of the state's infrastructure in the 1960s and 70s, leading to a period of economic stagnation. West Bengal politics underwent a major change when the Left Front won the 1977 assembly election, defeating the incumbent Indian National Congress. The Left Front, led by the Communist Party of India (Marxist)
Geography of West Bengal at places. West Bengal stands third in the country in terms of mineral production. The state contributes about one-fifth to the total production of minerals in the country. Coal constitutes 99% of the minerals extracted in West Bengal; fireclay, china clay, limestone, copper, iron, wolfram, manganese and dolomite are mined in small quantities. There are good possibilities of obtaining mineral oil and natural gas in the areas near the Bay of Bengal, in Purba Medinipur, Sundarbans, South 24 Parganas and North Bengal plains. Research is ongoing in various places to locate natural gas. West Bengal is the third largest state