Manipur attained 'full statehood' within the Indian Union in which year?

1972

The Government of India exerted pressure on the Maharaja to sign a Merger Agreement in September 1949 without consulting the popularly elected Legislative Assembly.
The unilateral decision of the merger caused anger and resentment among the people of Manipur which is felt till today
After the merger, Manipur initially became a Union Territory of India, directly administered by the central government.
In 1956 Manipur was made the Union Territory of India. In January 1972, it attained full statehood.