The attack at the Army Public School and College was the deadliest slaughter of innocents in the country and horrified a nation already weary of unending militant assaults.
Analysts said the school siege showed that even diminished, the militant group still could inflict horrific carnage.
The full devastation of a Taliban attack on a Pakistani school that left 148 people, mostly children, dead was revealed on Wednesday.
Walls inside the Peshawar school were pockmarked with bullet holes while the floors were streaked with blood.
Torn notebooks, pieces of clothing and children's shoes were scattered about.Army commandos fought the Taliban in a day-long battle until the school was cleared and the attackers dead.
The rampage at the Army Public School and College began in the morning when seven militants scaled a back wall using a ladder, said Maj. Gen. Asim Bajwa, a military spokesman. When they reached an auditorium where students had gathered for an event, they opened fire.