 To overawe the Persian Shah from interfering in this task, Shah Jahan assembled a 50,000 strong army in Kabul.On this occasion Jai Singh received the unique title of Mirza Raja from Shah Jahan, which had earlier been given to his grandfather Raja Man Singh I of Amber by Emperor Akbar.In 1647 Raja Jai Singh joined in Shah Jahan's invasion of Balkh and Badakshan in Central Asia.