Atanasio Aguirre

Atanasio de la Cruz Aguirre was acting President of Uruguay from 1864 to 1865.

Background
Aguirre was a member of the National Party; he was a Senator from 1861.

On March 1, 1864, Bernardo Berro stepped down from the Presidency.

President of Uruguay
He assumed the Presidency of Uruguay as next-in-line, in his capacity of President of the Senate. This lasted until February 1865.

During the Paraguayan War, Francisco Solano López had sought to send an army to aid Aguirre against Venancio Flores, who was supported by Brazilian troops.

With Montevideo under siege, Atanasio de la Cruz Aguirre stepped down from the Presidency in favour of Senator Tomás Villalba, who soon made peace with the Colorado Party besiegers, allied with Brazil.

This transition of power marked the coming to Presidential office of heads of state of the Colorado Party, which then remained in office for nearly a century.