BEIRUT - Syrian warplanes bombed insurgents east of Damascus on Saturday and government forces pounded a town to the southwest, activists said, in a month-long and so far fruitless campaign to dislodge rebels around the capital. Jets bombarded the Beit Sahm district on the road leading to the international airport and the army fired rockets at several rebel strongholds around Damascus, President Bashar al-Assad's bastion through 21 months of an increasingly bloody uprising. The 47-year-old Alawite leader, forced on the defensive by the mainly Sunni Muslim rebels, has resorted increasingly to air strikes and artillery to stem their advances on the ground. NATO's US commander also accused his forces on Friday of firing Scud missiles that landed near the Turkish border, in explaining why the Western alliance was sending anti-missile batteries and troops to Syria's northern frontier. The Syrian government denies firing such long-range, Soviet-built rockets. But Admiral James Stavridis wrote in a blog that a handful of Scud missiles were launched inside Syria in recent days towards opposition targets and "several landed fairly close to the Turkish border, which is very worrisome". It was not clear how close they came. Turkey, a NATO member once friendly toward Assad but now among the main allies of the rebels, has complained of occasional artillery and gunfire across the border, some of which has caused deaths, for months. It sought the installation of missile defenses along its frontier some weeks ago. "Syria is clearly a chaotic and dangerous situation, but we have an absolute obligation to defend the borders of the alliance from any threat emanating from that troubled state," Stavridis wrote. Batteries of US-made Patriot missiles, designed to shoot down the likes of the Scuds popularly associated with Iraq's 1991 Gulf War under Saddam Hussein, are about to be deployed by the U.S., German and Dutch armies, each of which is sending up to 400 troops to operate and protect the rocket systems. Damascus has accused Western powers of backing what it portrays as a Sunni Islamist "terrorist" campaign against it and says Washington and Europe have publicly voiced concerns of late that Assad's forces might resort to chemical weapons solely as a pretext for preparing a possible military intervention. In contrast to NATO's air campaign in support of Libya's successful revolt last year against Muammar Gaddafi, Western powers have shied away from intervention in Syria. They have cited the greater size and ethnic and religious complexity of a major Arab state at the heart of the Middle East - but have also lacked UN approval due to Russia's support for Assad. As well as the growing rebel challenge, Syria faces an alliance of Arab and Western powers who stepped up diplomatic support for Assad's political foes at a meeting in Morocco on Wednesday and warned him he could not win Syria's civil war.