 Complete the following phrase:  Armed struggle against the Portuguese began in March 1962 with an abortive attack by PAIGC guerrillas on Praia. Guerrilla warfare was largely concentrated to the mainland Guinea, however, as logistical reasons prevented an armed struggle on the Cape Verde islands. On the Cape Verde islands PAIGC worked in a clandestine manner. After being nearly crippled militarily, Amílcar Cabral ordered that sabotage be the PAIGCs main weapon until military strength could be regained. On 23 January 1963 the PAIGC started the 