On 1 November 1959 Dominique Mbonyumutwa, a Hutu sub-chief, was attacked close to his home in Byimana, Gitarama prefecture, by supporters of the pro-Tutsi party. Mbonyumutwa survived, but rumours began spreading that he had been killed.
Peres was first elected to the Knesset in the 1959 elections, as a member of the Mapai party. He was given the role of Deputy Defense Minister, which he filled until 1965.