FARAH STOCKMAN White House gives few answers on US mission in Syria ← Related Article Visit The Boston Globe Share on Twitter Share on Facebook Comment on this Scroll to top of page Combined US-Arab airstrikes beginning in September hit Islamic State group military strongholds in Syria and Iraq. AP/Eric Garst/US Navy The guided-missile cruiser USS Philippine Sea launched a Tomahawk cruise missile at Islamic State group positions in Syria on Sept. 23. AP/Eric Garst/US Navy The top American military official, Army General Martin Dempsey, said the US and its Arab allies achieved their aim of showing the extremists that their savage attacks will not go unanswered. US Navy via Getty Images The guided-missile destroyer USS Arleigh Burke launched Tomahawk cruise missiles from the Red Sea. US Navy via Getty Images The coalition used land- and sea-based US aircraft as well as Tomahawk cruise missiles. ROBERT BURCK/US NAVY/HANDOUT An F/A-18C Hornet, attached to Strike Fighter Squadron (VFA) 87, prepared to launch from the flight deck of the aircraft carrier USS George H.W. Bush. AP/amateur video via AP video This image made from amateur video posted on an activist social media account showed an explosion in the village of Kfar Derian. AP/Edlib News Network ENN This photo provided by anti-Bashar Assad activist group Edlib News Network (ENN) showed Syrian citizens checking a damaged house that they say was targeted by the coalition airstrikes in the village of Kfar Derian. AP/Edlib News Network ENN The US and five Arab nations attacked the Islamic State group’s headquarters in eastern Syria in nighttime raids.