=19th Century=

1785-1786: Burmese invasion of Siam: Burma attempts to invade Siam again but is repelled.

1809-1812: Burmese-Siamese War: Conflicts over control of territories along the border.

1812: Treaty of Yandabo II: Peace treaty signed, reaffirming boundaries and trade agreements.

1824-1826: First Anglo-Burmese War: British intervention in Burma leads to territorial changes and affects Siamese-Burmese relations.

1849-1855: Second Anglo-Burmese War: Further territorial changes in Burma, impacting the balance of power in the region.

1855: Treaty of Baubau: Siamese-Burmese treaty reaffirming mutual recognition of borders and trade.