SHERWANGAI, Pakistan – Pakistani soldiers battling their way into a Taliban stronghold along the Afghan border have seized passports that may be linked to 9/11 suspects, as they confront an enemy skilled in operating in a mountainous terrain with endless ways to wage a guerrilla war.

The military on Thursday took foreign and local journalists for a first look inside the largely lawless territory since it launched a ground offensive here in mid-October. The U.S.-backed operation is focused on a section of the tribal region where the Pakistani Taliban are based and are believed to shelter a