Together with Ulugh Beg and Sultan Muhammad bin Baysonqor (سلطان محمد ابن بایسنغر ‬ ) (who gained control of central Persia), Babur became one of the three important Timurid rulers. This balance of power was soon upset by Sultan Muhammad bin Baysonqor, who invaded Khurasan. The campaign started out badly for Babur, with a defeat at Mashad in March 1450 convinced him to cede parts of his territory.