Little time war

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The destruction of Skaro, (TV: Remembrance of the Daleks) the catalyst of the "little" time war. (PROSE: The Slyther of Shoreditch)

According to the Seventh Corsair, the Destruction of Skaro by the Hand of Omega triggered a "little" time war, which was eventually erased by the Last Great Time War. (PROSE: One Virtue, and a Thousand Crimes) In any event, during the events leading up to Skaro's destruction, the Seventh Doctor encountered a Time Lord operative who warned him that the Daleks were preparing to engage the Time Lords in the Pas Jass-Vortan. (PROSE: The Slyther of Shoreditch)