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.
Punjabi Suba movement
In the 1950s, the linguistic groups across India sought statehood, which led to the establishment of the States Reorganisation Commission in dec 1953. At that time, the East Punjab state of India included present-day states of Punjab, Haryana and Himachal Pradesh (some parts) along with Chandigarh. East Punjab had a majority of Hindu religion followed by the Sikhs.