Luis Adolfo Siles Salinas (21 June 1925 – 19 October 2005)[1] was a Bolivian jurist, lawyer, politician, and human rights activist who served as the 49th president of Bolivia from April to September 1969.

Siles eventually joined the small Partido Demócrata Cristiano (Christian-Democrat Party), which supported René Barrientos in the 1966 elections.

In fact, Siles ran as General Barrientos' vice-presidential running mate, and was sworn-in in that capacity after their ticket prevailed at the polls.

For these reasons, in addition to resentment over the constant meddling by Ovando, Siles seemed to be throwing his support behind the surprise candidacy of the Mayor of La Paz, Armando Escobar Uría, as the true heir and successor to Barrientos (Bolivian laws did not allow direct re-election of a sitting president).

In the end General Ovando decided not to wait for the elections and instead launched a coup d'état on 26 September 1969, overthrowing Siles and with him, what was left of Bolivian democracy (or its appearances, in any case).