The Cambridge History of India, Vol. IV: The Mughul Period v4.c19.158

v4.c19.158

Shāh Jahān had learnt something of strategy and politics in the Deccan and clearly perceived that the key to it was the possession of the strong fortress of Daulatābād. He had learnt also that the canker-worm of treason and corruption which eventually destroyed the efficiency of the imperial armies flourished in the Deccan, so that the capture of Daulatābād required the sovereign's personal attention. At the end of 1629 he set out for Burhānpur, and many of the officers of Murtazā's army, learning that the emperor proposed to command in person, ensured their future prosperity by deserting their master.