Amar Singh bravely defended his territory and fought a tough battle at the pass of Dewar
and the territories around Chittor along with the Chittorgarh Fort were given back to Mewar in 1616 by Jehangir, as goodwill gesture. Later, when Amar Singh went to meet Jehangir at Ajmer, he was given a warm welcome by Mughal Emperor. He started negotiations with them and finally, entered into a treaty with Shah Jahan, who negotiated on behalf of Jehangir in 1615, where in it was agreed that Ruler of Mewar will not be bound to present himself in person at Mughal court. Ultimately, after Mewar was depleted financially and in manpower due to several battles against Mughals, he thought it was prudent diplomatic move in interest of his pupils and Mewar, to conditionally accept the Mughals as rulers. Many temples were destroyed and several villages put on fire and ladies and children were captured and tortured to make Amar Singh accept surrender. Later an expedition was again sent under leadership of Prince Shah Jahan, which caused much damage to life and property of Mewar. Jehangir sent another army against Amar Singh in 1608 under Mahabat Khan in which though Mughals won but they could not make any decisive change to ground situation.
Amar Singh was able to defend his territories in the battle. He thrust his spear with such a force that the weapon struck in the ground after piercing the strong coat of mail and chaste and the horse of Sultan Khan. Amar Singh showed great bravery in Battle of Dewar and in the battle Amar Singh killed the Mughal commander in charge, Sultan Khan. He sent Prince Pravez and Asaf Khan, who led an army of 20,000 horse which fought a battle against Rana Amar Singh at Dewar in year 1606, which was fought in a valley of Aravalli about 40 km north-east of Kumbhalgarh. He submitted Mewar to Akbar after getting his father killed but Jahangir was against such a victory over Mewar which gave birth to rivalry between both.After the death of Akbar,Mewar was given back to Amar Singh by Jahangir under his mastership but rebellions later led by Amar Singh wooed Jahangir to go for expeditions.The first expedition Jahangir sent after his coronation was against Amar Singh. Amar Singh, fought many wars with Jahangir during his lifetime.