Second Galactic Civil War (OOM's timeline)

Background information
The war started as a revenge of what happened the last time. After it was discovered that the Republic had funded the terrorists who conducted the Tycerian Spaceport Massacre. After negotiations broke down, war was declared

War
Several years of bloody battles, the Second Battle of Coruscant caused the Republic to fall back to Dac. The end result was the death of JTN-451, and billions of sentient beings. The result was a 2 month long campaign known as the Battle of Dac. That battle along killed 4 million people

Treaty of Dac
"The Treaty of Dac gives the Empire control over all Republic territory in the Mid rim, Outer rim, while in return the Empire will give up control of 20 former Imperial worlds in the Inner rim and the Colonies."

Following the surrender of the last Republic controlled city on Dac, the Treaty of Dac was ratified by both Senates, however the damage was already done and soon the Republic collapsed under the weight of new crime syndicates and just the chaos was enough to bring the Republic down. The New Republic was established under a new rule, but crime syndicates took power in the Colonies and the Core