Warsaw Pact troops and roughly 2,000 tanks invaded Czechoslovakia overnight to crush the reforms of the Prague Spring.

The Kingdom of Swaziland (now Eswatini) gained independence from Britain, restoring sovereignty to King Sobhuza II under a new constitutional monarchy.

The Kingdom of Swaziland (now Eswatini) became fully independent from Britain, with King Sobhuza II as head of a new constitutional monarchy.

NASA launched Apollo 7, its first crewed mission after the fatal Apollo 1 fire, testing the redesigned command module in Earth orbit for eleven days.

Cesar Chavez's grape boycott gained major momentum as consumer support surged, pressuring California growers toward historic labor agreements.

Tommie Smith and John Carlos raised black-gloved fists on the medal podium at the Mexico City Olympics, a silent protest against racism that stunned the world.

The Soviet uncrewed spacecraft Zond 6 looped around the Moon and photographed its far side before a parachute failure crash-landed it back on Earth.

Astronauts Frank Borman, Jim Lovell, and William Anders returned safely to Earth after humanity's first crewed voyage around the Moon.

Astronauts Frank Borman, Jim Lovell, and Bill Anders continue their historic lunar orbits, the first humans ever to leave Earth's gravitational pull and circle another world.