 Complete the following phrase:  In January 2015, Charles de Gaulle began being prepared for exercises in the Indian Ocean. In late February, the carrier and its battle group entered the Persian Gulf to participate in Opération Chammal against Islamic State militants in Iraq. France was the first country to join the American-led intervention and has 15 fighters, a patrol aircraft, and refueling aircraft based on land in neighboring countries. The addition of Charles de Gaulle added up to another 30 aircraft to Frances commitment to operations. The carrier battle group arrived in the Persian Gulf on 15 February 2015 and began launching airstrikes on 22 February; this occurred seven weeks after the 