Many territories in Peninsular Malaysia and eastern Sumatra and the surrounding islands, such as Perak, Bernam, while Siak became Malacca's vassal.
Mansur Shah also used marriage alliances between princesses of Malacca and the rulers of conquered states, such as the marriage between the king of Siak to Mansur Shah's daughter, Princess Mahadewi, to strengthen Malacca’s control over those states.
According to historian Tomé Pires, Princess Hang Li Po, daughter of the Ming Dynasty Emperor Yongle (1403–1424), was sent over with her sizable entourage to marry Sultan Mansur Shah.
He studied under Maulana Abu Bakar, who brought the Ab Darul Manzum scriptures to Malacca.
Mansur Shah referred to scholars from Pasai on religious issues due to their expertise.