The first occasion for Prince Khurram to test out his military prowess was during the Mughal campaign against the Rajput state of Mewar, which had been a hostile force to the Mughals since Akbars reign. In 1614, commanding an army numbering around 200,000, Prince Khurram began the offensive against the Rajput kingdom. After a year of the harsh war of attrition, Maharana Amar Singh II surrendered to the Mughal forces and became a vassal state of the Mughal Empire.
In 1617, Prince Khurram was directed to deal with the Lodi in the Deccan, to secure the Empires southern borders and to restore imperial control over the region. His successes in these conflicts led to Jahangir granting him the title of Shah Jahan (Persian: Glory of the World) and raised his military rank and allowed him a special throne in his Durbar, an unprecedented honour for a prince, thus further solidifying his status as crown prince.