sentences:  In November 1990, this second commission confirmed the existence of secret, illegal files, as well as revealing the existence of P-26, a secret stay-behind army, and a secret intelligence gathering unit called P-27, both hidden in the Swiss military secret service UNA.Only a month before, the Italian prime minister Giulio Andreotti had revealed the existence of Gladio, a NATO stay-behind network in all European countries.The police files themselves were transferred to the Swiss Federal Archives.