High Quality Content by WIKIPEDIA articles! The Burmese Siamese war of 1548 was the first of many wars fought between the Burmese of Pegu and the Siamese of Ayutthaya. The war began with an invasion by King Tabinshwehti of the Taungoo Dynasty through the Three Pagodas Pass into Siamese territory, which presaged an attack on the capital city of Ayutthaya itself. The invasion came after a political crisis in Ayutthaya that had ended with the placing of Maha Chakkraphat on the Siamese throne. The war is notable for the introduction of early modern warfare by Portuguese mercenaries. It is most notable in the history of Thailand for the valiant death in battle of Siamese Queen Suriyothai on her war elephant. As a result the conflict is often referred to in Thailand as the War that led to the loss of Queen Suriyothai.