All times in UTC ·
Dashed edge = started before, or continues beyond, this day
Events on Tuesday 20 November 1917 4
1917Battle of CambraiFirst massed use of tanks in warfareBritish forces launched a surprise offensive near Cambrai using hundreds of tanks en masse for the first time, achieving rapid early gains before a German counterattack recovered most of the lost ground. The battle proved the tactical potential of armored warfare and influenced military doctrine for decades.
1917CambraiCambrai, FranceNearly 400 tanks attacked together over firm ground without a preliminary bombardment, and broke through. Church bells rang in Britain. A German counter-attack took most of the ground back.
1917DeraaDeraa, Ottoman SyriaCaptured while scouting in disguise, Lawrence was beaten and, by his own account in Seven Pillars, sexually assaulted before escaping. Historians disagree about what happened; he described it as the night his will broke.
1917 – 2010Robert Byrd (1917-2010)Died 28 June 2010, aged 92Byrd was a United States Senator from West Virginia who served longer than any other senator in American history, spanning more than 50 years in office. He was a leading advocate for Senate procedure and constitutional authority. He died in office of natural causes.