Occasions:
(1) The conquest of Assam, which was under British protection, by the King of Ava in 1823, and the attack by him on a British fort at Shapur, led to the declaration of war against Burma.
(2) The insults offered to the British flag at Rangoon by the King of Ava, led to the fresh outbreak of war in 1851.
(3) King Thibaw’s despotic rule and his design to enter into an agreement with France, led to the last Ultimatum in 1885.