By the time the fighting had ended, the Jedi Temple had been reduced to rubble, six members of the Jedi High Council had been killed, and Lord Angral had assassinated the Supreme Chancellor of the Republic. Although the surviving members of the Jedi Order and the Republic Special Forces Division attempted to defend their capital, the Sith forces overwhelmed them. With the Jedi defeated, a fleet of Sith warships under the command of the Lord Darth Angral descended upon the planet, bombarding the cityscape and deploying Imperial soldiers and warriors to the surface. The Warriors had a violent altercation with the Temple's Jedi defenders, led by Master Ven Zallow, but were victorious in their mission.
This allowed for the Sith Lord Darth Malgus to enter the Jedi Temple alongside a group of fifty Sith Warriors and lay siege to the ancient edifice. While Republic and Imperial delegations convened on Alderaan for treaty negotiations, the Imperial-employed Mandalorian Shae Vizla traveled to the Republic capital world of Coruscant and deactivated the planet's defense grid. Unbeknownst to the Republic, the Sith had no intention of allowing the war to come to a peaceful conclusion. Although cautious of the Empire's intentions, the Galactic Senate of the Republic accepted the much-needed reprieve. At what seemed to be the height of their campaign, the Sith surprised the galaxy and extended an offer of peace to the Republic. After decades of fighting, the Republic was overwhelmed and inundated both economically and militarily, while the Empire continued to gain ground. Centuries after the supposed destruction of the original Empire, a surviving faction of the Sith returned from the Unknown Regions and waged a massive war against the Republic. The Sacking of Coruscant, also known as the Battle of Coruscant, occurred at the end of the Great Galactic War between the Galactic Republic and the resurgent Sith Empire.
And now, your Republic shall fall." ―Darth Malgus - Listen ( file info)