536 Byzantine General Belisarius enters Rome while the Ostrogothic garrison peacefully leaves the city, returning the old capital to its empire 1212 Frederick II (later also Holy Roman Emperor) crowned King of Germany in Mainz 1968 NLS (a system for which hypertext and the computer mouse were developed) is publicly demonstrated for the first time in San Francisco. 1990 Lech Wałęsa wins Poland's 1st direct presidential election in Poland 1992 Operation Restore Hope: US Marines land in Somalia |
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