Sardar Vallabhbhai Patel was the defense Mister of India during the time of independence. A major problem of that time was merging of the princely states into Indian territory. almost all the princely states were ready to join India except Kashmir ,Hyderabad and Junagarh . the matter of Kashmir was given in hand of Pandit  Nehru whereas Hyderabad and Junagarh was given to Sardar Vallabhbhai Patel. He forced them to join India.