When you're doing your legend, just add something like
"Key:
History of anti-Semistism
Adolf Hitler's rise to power WW2"
and then just change those to different colors. Then change the color of the text to the color that corresponds to the event.
Events
History of anti-Semitism
598 BC–beginning of the Babylonian Exile when the Jews were forced to leave Judah
AD 70–destruction of the Temple in Jerusalem by Roman Emperor Titus (The Jewish people living after this point are considered part of a permanent diaspora.)
1545–Martin Luther, father of the Protestant Reformation (and a German), writes a pamphlet titled The Jews and their Lies, urging killing Jews before they could kill Christians (The pamphlet was reprinted by the Nazis.)
1791–Jews are emancipated in France
1873–the term “anti-Semitism” is coined by a German political agitator, advocating that Jews be excluded from German citizenship
Adolf Hitler's rise to power
1921—Hitler takes over what is now known as the Nazi Party
November 8, 1923—The Beer Hall Putsch
1925—Hitler is out of jail and publishes Mein Kampf
1932—Hitler runs for president but loses (The Nazis win the largest percentage of seats in the Reichstag but not a majority.)
February 27, 1933—The Reichstag Fire provides the excuse Hitler needs to assert stricter control over the government and police
WW2
March 13, 1938—Anschluss, incorporation of Austria
November 9-10, 1938—Kristallnacht, violent anti-Jewish pogroms throughout Germany
September 1, 1939—Germany invades Poland, WWII begins
June 22, 1941—Germany invades the Soviet Union (Operation Barbarossa)
December 7, 1941—Japan attacks Pearl Harbor, US declares war
January 31, 1943—German Field Marshal Friedrich von Paulus surrenders at Stalingrad
June 6, 1944—D-Day: Allied invasion of France begins as 176,000 men are ferried across the English Channel and 24,000 paratroopers land behind enemy lines
May 9, 1945—V-E Day is celebrated, the war in Europe is over
August 6, 1945—atomic bomb dropped on Hiroshima
August 14, 1945—Japanese accept terms of unconditional surrender