There is a new drive to try and unite all the rebel forces in Libya as one 'National Army'.<br /><br />But despite this, and four months of NATO bombings targeting key government installations, progress for the opposition has been slow. <br /><br />This has raised questions about whether the patchwork of rebel forces can achieve its ultimate goal of removing Muammar Gaddafi.<br /><br />Former government officers are now the trainers responsible for readying rebel fighters for battle. And as the opposition heads towards Tripoli, the pressure on them is increasing.<br /><br />Al Jazeera's Hoda Abdel-Hamid reports from Misurata.