Lan Xang
The Lord of Prome staged a rebellion against Nanda Bayin in 1595, followed by Taungoo, Rakhine, Lan Na, and Lan Xang. King Nokeo Koumane of Lan Xang prepared to march through Lan Na to Bago to rescue the people of Lan Xang held captive. The Viceroy of Lan Na Chiang Mai then submitted his territory to Siamese control and Naresuan sent Siamese forces to prevent Laotian forces from entering Lan Na.