Himachal Pradesh as political entity came into existence on 15th April, 1948

Himachal Pradesh as political entity came into existence on 15th April, 1948. It was constituted by integrating the princely States of Chamba, Mandi, Suket, Sirmaur and 26 smaller states known as the Punjab Hill States. Subsequently, in 1954 Bilaspur, which was then a part "C" State, was also merged with Himachal Pradesh. In 1960 District Kinnaur was carved out of District Mahsu which was earlier (Extractive summary — verify with official source.)