1919

In August 1919, the Second Doctor, Jamie McCrimmon and Zoe Heriot visited Uzbekistan. (AUDIO: The Memory Cheats)

The 1919 flu epidemic, (PROSE: The Clockwise Man) continuing on from 1918, (TV: The Unicorn and the Wasp, AUDIO: The White Room) killed more people than World War I. (PROSE: The Clockwise Man)

At Versailles in France, a conference was held for the signing of the peace treaty after World War I. George Limb was present at the conference and was later suspected by Chief Inspector Patrick Mullen and the Seventh Doctor of sabotaging the treaty, influencing the beginning of World War II twenty years later. (PROSE: Illegal Alien) Anton Drexler and Dietrich Erhart founded the Nazi Party in Germany that year in reaction to the treaty. (PROSE: Timewyrm: Exodus)

The Seventh Doctor, Bernice Summerfield, Roz Forrester and Chris Cwej investigated the disappearance of children throughout Europe and assisted in the end of the war on Q'ell. (PROSE: Toy Soldiers)

Harriet Derbyshire of Torchwood Three was killed. (TV: To the Last Man)

Reuben Shaw, who later became the father of the Third Doctor's companion Liz Shaw, was born. (HOMEVID: Ghosts of Winterborne)

Grigori Kalashnikov was born. (AUDIO: 1963: The Space Race)

For Christmas, Charley Pollard's grandmother Ermentrude Pollard gave her a copy of Alice in Wonderland. (AUDIO: Zagreus, The Fall of the House of Pollard)

There was an archaeological expedition to Crook Marsham to dig up the ancient quarry but it was abandoned after several prominent members disappeared. (PROSE: Nightshade; AUDIO: Nightshade)

Roderick Simonsen murdered four police officers, though he claimed it was five. The fifth was actually Andy Davidson, who had been temporarily transported to this year. Simonsen was captured and sent to the gallows. (PROSE: They Keep Killing Andy)

Parallel universe
In a parallel universe known as Germania LXVIII, Adolf Hitler was an International Socialist rather than a Nazi and came to power after Spartacist uprisings in Germany and aimed to lead an international workers' revolution. (PROSE: Warlords of Utopia)