One of the Douro-class, Dão was a Portuguese destroyer commissioned in 1935. She wasn't in service long before her crew mutinied against the Portuguese government, probably inspired by the actions of Franco's faction in the Spanish Civil War. However, only one other ship joined them, and both were shot up by coast artillery when they tried to make a run for the sea. Dão was put back into service, and received updates to her armament and electronics several times during the 1940s and 50s. Dão was decommissioned in November, 1960, and subsequently scrapped.