In May 1962 ZAPU was banned because of militarism and Chitepo was persuaded to go into voluntary exile to escape possible detention. He became Tanganyika's first African Director of Public Prosecutions. The Ndabaningi Sithole and Joshua Nkomo factions of ZAPU split apart in July 1963. Nkomo's supporters founded the PCC-ZAPU (later just called ZAPU again) and favoured a more militaristic approach. As the more moderate faction, Chitepo sided with Sithole and was elected Chairman of ZANU (having defeated Nathan Shamuyarira) from its foundation. He held this post until 7 December 1974, when the Lusaka Accord was signed.