Marines and Afghan units converged Sunday on a dangerous western quarter of the Taliban stronghold of Marjah, with NATO forces facing «determined resistance» as their assault on the southern town entered its second week. The Marjah operation is a major test of a new NATO strategy that stresses protecting civilians over routing insurgents as quickly as possible. It's also the first major ground operation since President Barack Obama ordered 30,000 reinforcements to Afghanistan, AP reported. In a setback to that strategy, the Dutch prime minister said Sunday that his country's 1,600 troops would probably leave Afghanistan this year. Prime Minister Jan Peter Balkenende spoke a day after his government collapsed when a coalition partner insisted the Dutch troops leave in August as planned. Fighter jets, drones and attack helicopters flew over Marjah, as Marine and Afghan companies moved on a 2-square-mile (5.2-sq. kilometer) area of the town where more than 40 insurgents have apparently holed up. «They are squeezed,» said Lt. Col. Brian Christmas, commander of 3rd Battalion, 6th Marine Regiment. «It looks like they want to stay and fight but they can always drop their weapons and slip away. That's the nature of this war.»