In May 1990, Papua New Guinea imposed a blockade on Bougainville. Francis Ona responded by unilaterally declaring independence. He set up the Bougainville Interim Government (BIG), but it had little power, and the island began to descend into disarray. The command structure set up by the BRA seldom had any real control over the various groups throughout the island that claimed to be part of the BRA. A number of "" (criminal) gangs that were affiliated with the BRA, equipped largely with weapons salvaged from the fighting in World War II, terrorised villages, engaging in murder, rape and pillage. Bougainville split into several factions, and a civil war began.