Between 1600 and 1603, the Kingdom of Mrauk U with its powerful navy controlled over 1,000 miles (1,600 km) of the Bay of Bengal coastline following opportunistic attacks into Lower Burma during the collapse of the First Toungoo Empire.

[3] But De Brito revolted in March or April 1603 with support from the Portuguese viceroy of Goa - who appointed him governor of the new Syriam colony[4] In 1604, the King of Arakan, Min Razagyi, determined to expel the Portuguese from the fortress at Syriam, gathered a substantial fleet to launch an attack, the force was led by his eldest son, Prince Min Khamaung of Arakan, accompanied by two princes of Pegu and all the main captains of his kingdom.

[1][2] In response to the threat from Arakan, Filipe de Brito ordered the assembly of a Portuguese armada, commanded by Paulo do Rego Pinheiro.

On January 22, 1605, a group of 10 ships from the Arakan fleet, led by Min Khamaung, was sighted, far ahead of the main body of their forces.

Determined to besiege the fortress, Min Khamaung led his fleet through the narrow rivers and canals that provided access to Syriam, only to find the Portuguese blocking the passage.

Fierce cannon fire, musket shots, and black smoke filled the air, ultimately, the Portuguese repelled the first assault.

The King of Arakan, desperate to secure the release of his son, was forced to negotiate a peace treaty with Filipe de Brito.