What happened on 27 January?

13 events from the Ever-When timeline, ranked by how much they mattered.

1. 1945 Liberation of Auschwitz Red Army entered Auschwitz on 27 January 1945, finding about 7,000 prisoners left behind.
2. 1859 Born: Kaiser Wilhelm II Last German Emperor; presided over rise into and German defeat in WW1.
3. 1926 Schrödinger's wave equation A wave equation for the electron gives quantum mechanics a continuous mathematics — the founding equation of wave mechanics, and Schrödinger's Nobel Prize seven years later.
4. 1868 Boshin War Civil war between Tokugawa forces and the pro-imperial Satsuma-Chōshū alliance; imperial victory consolidates the new Meiji government.
5. 1832 Born: Lewis Carroll Mathematician and author of Alice's Adventures in Wonderland.
6. 1944 Siege of Leningrad lifted The Red Army breaks the encirclement after nearly 900 days and over a million deaths.
7. 1571 Born: Shah Abbas the Great Safavid ruler who made Isfahan one of the great cities of the early modern world.
8. 1973 Paris Peace Accords Agreement signed by the US, North and South Vietnam and the Viet Cong's PRG ostensibly ends US involvement; North Vietnam continues war against the South.
9. 2011 Yemen rises against Saleh Change Square in Sanaa fills against Ali Abdullah Saleh's 33-year rule — and stays filled through massacres and the president's own near-assassination, until a Gulf-brokered deal e
10. 1868 Battle of Toba-Fushimi Three weeks after the Restoration is proclaimed, shogunal forces march on Kyoto to reverse it — and are beaten outside the city by a smaller Satsuma-Choshu army flying the imperial
11. 1967 Outer Space Treaty The foundational treaty of space law bars nuclear weapons in orbit and claims of national sovereignty over the Moon.
12. 1967 Apollo 1 fire Grissom, White and Chaffee die in a launchpad fire during a routine test; the redesign that follows arguably saves the programme that reaches the Moon.
13. 1963 'Ae Mere Watan Ke Logo' Weeks after the war with China, Lata sings a tribute to fallen soldiers at Delhi's National Stadium; Nehru is said to weep.