Majha
The partition split the Punjab Province (British India) into the two states of West Punjab (Punjab, Pakistan) and East Punjab. However, the historic Majha region is arguably still the same as before since the partition does not change the previous history of Punjab, therefore does not change the geography of the Majha region of the historic Punjab region.
States Reorganisation Commission
The States Reorganisation Commission rejected the demand for a Punjabi-majority state saying that it lacked a majority support and that Punjabi was not grammatically very distinct from Hindi. The Patiala and East Punjab States Union (PEPSU) was merged with Punjab, though. Akali Dal continued its movement, and in 1966 the Punjab Reorganisation Act split Punjab into the Sikh-majority Punjab state and the Hindu-majority state of Haryana, with Chandigarh, administered as a separate union territory, as the shared capital of the two states.