History books may never tell the full story of the dictatorship that terrorized Argentina from 1976 to 1984.

But newly declassified United States military and intelligence documents recently delivered to Argentina offer new details about the country’s brutal military junta.

The archival documents were the fourth and final batch of 43,000 declassified U.S. telegrams, military records, intelligence and confidential memos given to Argentina following an extraordinary 2016 agreement between Argentine President Mauricio Macri and former U.S. President Barack Obama.

“Argentines now have more information about a dark period of our history that will allow us to continue strengthening justice, seeking and finding the truth,” Macri said on Twitter after receiving the 7,500-document report on April 12.

The archives narrate the human rights abuses committed by Argentina’s military government, often with the assistance of the United States. They include the forced disappearances of 30,000 people, international assassination squads that stalked their victims abroad and the kidnapping of hundreds of babies born in detention.