"Boko Haram is finished" shouted a jubilant soldier from Niger as his comrades danced and waved their rifles in the air to celebrate the liberation of the northern Nigerian town of Damasak.
Nigeria has brought in hundreds of mercenaries from South Africa and the former Soviet Union to give its offensive against Boko Haram a shot in the arm before a March 28 election, according to regional security, defense and diplomatic sources.
About ten Chadian soldiers died in fighting to free two towns in northern Nigeria previously held by Boko Haram, the first gains against the militants made in a joint offensive launched with Niger at the weekend, military sources said on Monday.