Under the leadership of Saenmuengma (whose name means ten thousand cities arrive — to pay tribute) Lan Na experienced a period of peace. However, there was a notable rebellion attempt by his uncle, Prince Maha Prommatat. Seeking support, Maha Prommatat reached out to Ayutthaya. In response, Borommaracha I from Ayutthaya sent forces to Lan Na, but they were turned back. This marked the initial military clash between the two regions. Later, Lan Na also had to defend itself from invasions by the emerging Ming Dynasty during Sam Fang Kaen's rule.