Carlos Manuel Arana Osorio (July 17, 1918 – December 6, 2003) was President of Guatemala from 1970 to 1974.
His government enforced torture, disappearances and killings against political and military adversaries, as well as common criminals.
Arana was born in Barberena, in the department of Santa Rosa.
A colonel in the Army, he was elected in an electoral process generally considered "non-transparent" on a platform promising a crackdown on law-and-order issues and stability; his vice president was Eduardo Cáceres.
In November 1970, Arana imposed a "State of Siege" which was followed by heightened counterinsurgency measures.
The government received continued large-scale military support from the United States, which provided weapons, technical support and military advisors to the security forces under Arana to assist in fighting the guerrillas.