On 28 September 2012, the Somali National Army assisted by AMISOM troops and Ras Kamboni militia launched an assault on Kismayo, Al-Shabaab's last major stronghold. The allied forces reportedly managed to re-capture much of the city from the insurgents. Operation Indian Ocean & Jubba Corridor In August 2014, the Somali government-led Operation Indian Ocean was launched to clean up the remaining insurgent-held pockets in the countryside. On 1 September 2014, a U.S. drone strike carried out as part of the broader mission killed Al-Shabaab leader Moktar Ali Zubeyr. U.S. authorities hailed the raid as a major symbolic and operational loss for Al-Shabaab, and the Somali government offered a 45-day amnesty to all moderate members of the militant group. Political analysts also suggested that the insurgent commander's death will likely lead to Al-Shabaab's fragmentation and eventual dissolution. At the end of the month of July 2015, AMISOM and the Somali National Army regained many villages and major towns of Baardhere and Dinsoor. 2016: Battle of El Adde and resurgence of Al Shabaab On 15 January 2016, Al Shabaab attacked a Kenyan-run AMISOM base in El Adde Somalia, overrunning the compound and killing approximately 185 soldiers. Al Shabaab then regained the important town of Marka, 45 km from the capital, and the port of Gard in Puntland region (March 2016). The resurgence of Al Shabaab could entail serious implications for the humanitarian sector. On 5 March 2016, U.S. airstrikes carried out by aircraft and unmanned drones killed more than 150 Al-Shabaab terrorists at a terrorist training camp called "Camp Raso", located about 120 miles north of Mogadishu as they were completing "training for a large-scale attack" according to a Pentagon spokesman. The camp had been under surveillance for some time before the strike. In the early hours of 9 March 2016, U.S. special forces and Somali national army special forces killed between 1 and 15 Al-Shabaab terrorists in a heliborne-attack on the Al-Shabaab-controlled town of Awdhegele, as well as capturing an undisclosed number of high-value Al-Shabaab figures the militants were training for a major operation against coalition forces. On 11/12 April 2016, two U.S. airstrikes on Al-Shabaab targets in the town of Kismayo killed about a dozen suspected militants who posed a "imminent threat" to American troops in the country. As of May 2016, roughly 50 U.S. special operations troops operate at undisclosed locations across southern Somalia, with their headquarters at the