Although Ulugh Beg was only sixteen years old when his father put him in control of Samarkand, he became his father's deputy and he became ruler of the Mawaraunnahr region.
Kahit Ulugh Patawarin ay lamang ng labing-anim na taon gulang na kapag ang kanyang ama sa kanya ilagay sa kontrol ng Samarkand, siya ay naging kanyang ama representante at siya ay naging pinuno ng Mawaraunnahr rehiyon.