 By 1972 , the Portuguese military had changed its strategy , adapting the British / American search and destroy operations utilising small shock troop <unk> . They also initiated a hearts and minds campaign , named the <unk> Programme , which was a forced relocation program . But on November 9 , 1972 , FRELIMO – not numbering more than 8 @,@ 000 fighters – launched a large offensive in Tete Province . The response from the Portuguese military was fierce , leading to reprisal attacks in an attempt to <unk> the local population 's continuing faith in FRELIMO . 
