Question

What was one motivation for the the Portuguese sailing into the
Melaka on the Malay Peninsula?

Answer 1

Admiral Afonso de Albuquerque sailed here, which is a thriving spice trade port on the Malay Peninsula, because the Portuguese wanted to find spice trade. Having Melaka would destroy Arab control of the space trade and provide the Portuguese with a way to get to the Moluccas(Spice Islands.)