REUTERS IS UNABLE TO INDEPENDENTLY VERIFY THE CONTENT OF THIS VIDEO WHICH WAS OBTAINED FROM A SOCIAL MEDIA WEBSITE<br/> <br />A tremendous explosion on the outskirts of Hama in west central Syria.<br/> <br />The target, according to video uploaded to a social media website, was a government checkpoint, where rebel fighters from the allied Islamic Front and Division 13 groups<br/> <br />had planted explosives.<br/> <br />Scenes like this are now being played out in cities across Syria... disparate rebel groups fighting government forces, and the better known Islamic State, in a bid for territory and overall control.<br/> <br />In the northern city of Aleppo, attacks like these have become part of everyday life, with rebel fighters, armed with machine guns and heavy artillery, clashing with government troops.<br/> <br />Syria's civil war is now being fought on multiple fronts and involves multiple combatants including the U.S.-led coalition conducting air strikes on Islamic State positions in the north.<br/> <br />And aft
