0 ATC (3653 BBY)-Treaty of Coruscant signed, ending the Great Galactic War and starting the Cold War era.
30 ATC (3623 BBY)-The Cold War era ends.
42 BBY-Anakin Skywalker born: Anakin Skywalker, the Chosen One who will bring balance to the Force, is born to a slave named Shmi Skywalker on an unknown world
33 BBY-Invasion of Naboo: The Trade Federation, under the influence of Darth Sidious, blockades, and eventually invades, Naboo at the behest of the Dark Lord of the Sith.
23 BBY-Battle of Geonosis: The Clone Wars begins with the Battle of Geonosis.
23-20 BBY-The Clone Wars: The Clone Wars happen.
20 BBY-Birth of the Galactic Empire: Palpatine reorganizes the Galactic Republic into the Galactic Empire with himself as Emperor and Anakin Skywalker turns to the dark side of the Force and becomes Darth Vader, Palpatine's ruthless second-in-command and third apprentice.
0 ABY-Battle of Yavin: Aboard the Millennium Falcon, Han Solo, Chewbacca, Luke Skywalker, Princess Leia, C-3PO and R2-D2 landed on the Rebel base on Yavin 4. The data tapes inside R2-D2 are used by the Rebel Alliance to discover the location of the weakest point that will allow them to destroy the Death Star.
With the assistance of Obi-Wan Kenobi's spirit and Han Solo aboard the Millennium Falcon, Luke Skywalker finds the location of the weakest point and destroys the Death Star before it can destroy the Rebel base on Yavin 4. Grand Moff Tarkin dies in the destruction of the Death Star. Luke Skywalker and Han Solo join the Rebel Alliance.
3 ABY-Battle of Hoth: The Rebel Alliance moved to Hoth after their victory in the Battle of Yavin. However, an Imperial probe droid discovered their base, then self-destructed. The Rebels immediately began preparations to leave, but Darth Vader's Death Squadron, the 501st legion of the Imperial Army, Blizzard Force, arrived in time to intercept them, forcing the Rebels into a skirmish to cover their escape. Although the Empire won the Battle of Hoth by destroying the Rebel base and capturing many Rebel personnel and equipment, the Rebels didn't attempt a full-scale defense, but rather worked to stall the Empire's forces long enough to stage an effective evacuation, and to allow the deletion of compromising information about the whereabouts of the Rebel Fleet. Since the Rebels did evacuate vital leadership, personnel, and equipment, the Empire failed to do more than stall the Rebels' plans, and the Rebel Fleet remained elusive.
4 ABY-Battle of Endor: Lando Calrissian, Wedge Antilles and Nien Nunb destroy the second Death Star, bringing about the defining turning point in the Galactic Civil War. No longer under the sway of its dark Sith rulers, the Empire begins to tear itself apart through warlordism.