The newly released documents by the Spanish government commemorate the failed coup attempt of February 23, 1981, which is often referred to in Spain as 23-F. Among the materials disclosed are handwritten sketches outlining the military and civic operations that were intended to take place during the insurrection. A crucial element highlighted is King Juan Carlos I's decisive stance against the coup, wherein he declared that any coup would not be able to hide behind the monarchy, a significant factor in the coup's failure. This assertion took place early in the morning of the uprising when Lt. Colonel Antonio Tejero stormed the Spanish Congress armed, attempting to seize control.

As part of commemorating the 45th anniversary of this historic event, the Spanish government under Prime Minister Pedro Sánchez decided to declassify over 150 documents from various ministries including Interior, Defense, and Foreign Affairs. The release aims to shed light on the events of that day and clarify the reasons why the coup did not succeed. This move not only underscores the importance of transparency and accountability in historical events but also serves to educate the public about the threats to democracy that Spain faced in the past.

The released materials, now available to the public via the official Moncloa Palace website, include reports, conversations, and even sketches of the coup plan. This significant documentation allows historians and citizens alike to understand the military’s mindset during a critical moment in Spain's transition to democracy, as well as reflect on the resilience of democratic institutions against attempts at authoritarianism.