Beginning in the early 1960s—and especially by the end of the decade—a large number of the ethnic Hmong people in Thailand aligned themselves with the Communist Party of Thailand (CPT). By the 1970s, most of the CPT's “liberated areas” were located in remote, mountainous areas populated by Hmong people. In this paper, I situate Hmong involvement in CPT through the literature related to the multi-ethnic connections being made through the organisation of armed groups and argue that Hmong involvement with the CPT was transnational, transcultural and gender-relations-transforming. The first Hmong Thai to join the CPT was recruited in neighbouring Laos. Other Hmong in Thailand heard about the CPT through radio broadcasts from Laos in Hmong language. Furthermore, many of the early CPT recruits travelled from their homes in Thailand for political and military instruction at a basic training centre called A-30, which was located somewhere in northern Laos near the border with China. There, most Hmong CPT recruits learned to speak, read and write central Thai language. Hmong CPT also started to meaningfully interact with other Thais, including those from northeastern and southern Thailand and Chinese Thais from Bangkok. Later, those deemed to have particular potential were sent to study in China or in Vietnam for specific military training. Some Hmong sent their children to study with the CPT; others went on their own. The Hmong also interacted with people from other communist movements in Southeast Asia.