sentences:  Cut-off from their most abundant supply of opium in Afghanistan (due to conflicts associated with World War II), the French looked with favor upon Lyfoung for helping to improve the output of Laos.When the Japanese occupied Laos in March 1945, Lyfoung was arrested for his associations with the French.He escaped and moved to the mountains where he helped to lead guerrilla attacks against the occupiers with a Hmong militia that included the young future general, Vang Pao.