 By 1972 there was growing pressure from other commanders , particularly Kaúlza de Arriaga 's second in command , General Francisco da Costa Gomes , for the use of African soldiers in Flechas units . Flechas units ( Arrows ) were also employed in Angola and were units under the command of the Portuguese PIDE . Composed of local tribesmen , the units specialised in tracking , reconnaissance and anti @-@ terrorist operations . 
 By 1972 <a href='dey_it' title='1'><mark>there</mark></a> was growing pressure from other commanders , particularly Kaúlza de Arriaga <a href='null_genetive' title='2'><mark>'s</mark></a>second in command , General Francisco da Costa Gomes , for the use of African soldiers in Flechas units . Flechas units ( Arrows ) <a href='uninflect' title='3'><mark>were</mark></a> also employed in Angola and <a href='uninflect' title='4'><mark>were</mark></a> units under the command of the Portuguese PIDE . Composed of local tribesmen , the units specialised in tracking , reconnaissance and anti @-@ terrorist operations . 
By 1972 it was growin pressure from other commanders , particularly Kaúlza de Arriaga  second in command , General Francisco da Costa Gomes , fir da use of African soldiers in Flechas units . Flechas units ( Arrows ) was also employed in Angola and was units under tdacommand of the Portuguese PIDE . Composed of local tribesmen , the units specialised in tracking , reconnaissance and anti @-@ terrorist operations .