61 people have died so far this year in Pakistani IED blasts, compared to 268 in all of 2015.
The army's presence is meant to ensure the health and education of FATA residents.
The son of Sindh Province's top justice spent almost a month in Taliban captivity.
The mastermind of the 2014 Army Public School (APS) massacre was killed in Afghanistan, operationally neutralising the Tehreek-e-Taliban Pakistan (TTP), analysts say.
The province has started a number of programmes to safeguard religious minorities, officials say.
Police vigilance allowed Eid ul Fitr to pass peacefully without any major terrorism, officials said.
Gen. Raheel Sharif spent Eid ul Fitr with soldiers on the battlefield, commending their sacrifices in the war on terror.
Militancy has destroyed the fabric of society, and youth want to be part of the solution, analysts say.
Pakistani authorities have reinforced security in mosques and other public areas for the holiday.
About 2,000 of better equipped and well-trained jawans have joined FC to fight terrorism.