A group of 75 Taliban militants tried to overrun a US-led coalition base in southern Afghanistan in a brazen attack that left more than 20 militants dead, the coalition said. The insurgents attacked Firebase Anaconda from three sides on Tuesday, using gunfire, grenades and 107 mm rockets, the coalition said. A joint Afghan-U.S. force repelled the attack with mortars, machine guns and air power. "Almost two dozen insurgents were confirmed killed in the attack," it said in a statement. Two girls and two Afghan soldiers were wounded during the fight in Uruzgan province, it said. Firebases like Anaconda are usually remote outposts staffed by as few as several dozen soldiers.