However, he resigned later that year in protest against Serrano's decision to normalize relations with Belize, over most of whose territory Guatemala has long-standing claims.

[4] The main achievement of Arzú's presidency was the signature of a peace accord with the guerrilla group Guatemalan National Revolutionary Unity, which ended Guatemala's 36-year-long civil war.

[2] As part of this peace accord, Arzú's government proposed a series of reforms to the Constitution of Guatemala, including disbanding the Presidential Guard, reducing the armed forces, and recognizing the rights of indigenous communities.

[2] Under Arzú's presidency, there was a significant investment in the country's infrastructure; particularly, the roads were improved, and electric and telephone coverage was increased.

[2] Among other challenges faced by Arzú's government was the murder of Archbishop Juan José Gerardi in 1998, which was later attributed to members of the Presidential Guard.

[1] During this period, Arzú established the Transmetro bus rapid transit system and worked on restoring the historical center of Guatemala City.

[7] In his final years, 2017 and 2018, Arzú crusaded against the United Nations Commissioner of the International Commission against Impunity in Guatemala (CICIG), Iván Velásquez, and against the Attorney General, Thelma Aldana, openly accusing them of carrying out a slow coup d'état against President Morales under the cover of a fight against corruption and impunity.