1588

In 1588, a butterfly was released by an agent of the Council of Eight. This led to a storm being created which sank the Spanish Armada. Octan was killed by the agent accidentally just prior to it letting the butterfly go. (PROSE: Sometime Never...)

An unknown incarnation of the Doctor was playing bowls with Francis Drake when Drake was called away to fight the Spanish Armada. The Doctor let Drake win so he could get away to join the fight. Elizabeth I, in the year of her death, told the Seventh Doctor that this act "saved our realm". (PROSE: Birthright)