The Haqqani network is an Islamist insurgent group using asymmetric warfare to fight against US-led NATO forces and the government of Afghanistan. Maulvi Jalaluddin Haqqani and his son Sirajuddin Haqqani lead the group, which operates on both sides of the Afghanistan-Pakistan border; but U.S. officials believe it is based in Pakistan's Waziristan tribal frontier. The Haqqani network is allied with the Taliban.