Associated Press journalists saw a handful of tanks move Sunday into Jenin, long a bastion of armed struggle against Israel.

A month-long sweep for Palestinian militants in the northern West Bank could continue for a year, Israel’s defense minister said, adding that residents who fled will be barred from returning and that a contested UN relief agency’s work there will be halted.

During that war, 700,000 Palestinians fled or were forced from their homes in what is now Israel. That Nakba, or “catastrophe,” as Palestinians call it, gave rise to the crowded West Bank towns now under assault and still known as refugee camps.