04 July 1522,
Spanish emperor Carlos began an offensive against the castle of Amaiur. Their soldiers left Pamplona. After the battle of Noáin last year, the Spaniards returned to control almost all of Navarre, but in the castle of Amaiur there were about 200 Navarros willing to defend the Gothic until the end. In the image, recreation of the castle.
If you want to delve into the events of Amaiur, here is the story that led the cover of ARGIA.
Source:
Joseba Asiron and Martín Altzueta, 50 key dates of the conquest of Navarra (1512-1525).