Temporal Cold War
From Tardis Wiki, the free Doctor Who reference
The Temporal Cold War was a period in Gallifreyan history following the Ravalox Affair which eventually led to the outbreak of the Last Great Time War between the Time Lords of Gallifrey and the Daleks of Skaro. (GAME: The Time Traveller's Companion [+]Loading...["The Time Traveller's Companion (game)"])
Behind the scenes
Incidentally, a conflict known as the Temporal Cold War also took place in the universe of Star Trek as seen in Enterprise, which eventually put an end to the conflict after it went "hot", with Star Trek Discovery later moving from its initial 23rd century setting to a future following the temporal war.