The two armies clashed at Dharmat in April 1658, with Aurangzeb being the victor. Shuja was being chased through Bihar and the victory of Aurangzeb proved this to be a poor decision by Dara Shikoh, who now had a defeated force on one front and a successful force unnecessarily pre-occupied on another. Realising that his recalled Bihar forces would not arrive at Agra in time to resist the emboldened Aurangzeb's advance, Dara scrambled to form alliances in order but found that Aurangzeb had already courted key potential candidates. When Dara's disparate, hastily concocted army clashed with Aurangzeb's well-disciplined, battle-hardened force at the battle of Samugarh in late May, neither Dara's men nor his generalship were any match for Aurangzeb. Dara had also become over-confident in his own abilities and, by ignoring advice not to lead in battle while his father was alive, he cemented the idea that he had usurped the throne. "After the defeat of Dara, Shah Jahan was imprisoned in the fort of Agra where he spent eight long years under the care of his favourite daughter Jahanara." Aurangzeb then broke his arrangement with Murad Baksh, which probably had been his intention all along. Instead of looking to partition the empire between himself and Murad, he had his brother arrested and imprisoned at Gwalior Fort. Murad was executed on 4 December 1661, ostensibly for the murder of the diwan of Gujarat sometime earlier. The allegation was encouraged by Aurangzeb, who caused the diwan's son to seek retribution for the death under the principles of Sharia law. Meanwhile, Dara gathered his forces, and moved to the Punjab. The army sent against Shuja was trapped in the east, its generals Jai Singh and Dilir Khan submitted to Aurangzeb, but Dara's son, Suleiman Shikoh, escaped. Aurangzeb offered Shah Shuja the governorship of Bengal. This move had the effect of isolating Dara Shikoh and causing more troops to defect to Aurangzeb. Shah Shuja, who had declared himself emperor in Bengal began to annex more territory and this prompted Aurangzeb to march from Punjab with a new and large army that fought during the battle of Khajwa, where Shah Shuja and his chain-mail armoured war elephants were routed by the forces loyal to Aurangzeb. Shah Shuja then fled to Arakan (in present-day Burma), where he was executed by the local rulers. With Shuja and Murad disposed of, and with his father immured in