Why European power never colonised Thailand?

European powers never colonized Thailand primarily due to its strategic diplomacy and modernization efforts during the colonial era. The Thai kingdom, known as Siam, skillfully navigated between competing imperial interests by negotiating treaties and concessions, showcasing its sovereignty. Additionally, Thailand implemented reforms to modernize its military and infrastructure, which helped maintain its independence. This diplomatic acumen allowed it to serve as a buffer state between British and French colonial territories in Southeast Asia.