 In 1964 , weak @-@ hearted attempts at peaceful negotiation by FRELIMO were abandoned and , on September 25 , 1964 , Eduardo Mondlane began to launch guerrilla attacks on targets in northern Mozambique from his base in Tanzania . FRELIMO soldiers , with logistical assistance from the local population , attacked the administrative post at Chai Chai in the province of Cabo <unk> . FRELIMO militants were able to evade pursuit and surveillance by employing classic guerrilla tactics : <unk> patrols , <unk> communication and railroad lines , and making hit @-@ and @-@ run attacks against colonial outposts before rapidly fading into accessible <unk> areas . The insurgents were typically armed with rifles and machine pistols , and the attackers took full advantage of the monsoon season in order to evade pursuit . 
