"This war you wish the Jedi to fight," Yoda said, looking over the Senate. "On Jedi terms we will fight. The clones we will not lead."
He turned and left the chambers, ignoring the protestations. The clone army had supposedly been commissioned by a dead man, and updates from said dead man had continued well after the man's confirmed death. It could not be trusted, but the Jedi had no need for the army.
Instead, he made his way back to the Temple. The High Council had many secrets, and one of them was that there was no such thing as a single Jedi sect. Anyone paying attention should realize that, given that Corellia's Temple did not answer to Coruscant's Temple. But Coruscant's Temple existed not only to pacify the Senate, but also to warn the other sects of situations such as this. Even he did not know how many sects existed, since by the will of the Force they did not keep records on each other, but the last rough estimate put the number of Jedi across the galaxy in the double-digit millions.
Pity that the Senate thought that all Jedi advertised themselves as such, but they were about to learn otherwise.
It took half an hour to make it into the vaults, revealing the Force Communicator kept there. Activating it off-schedule at all would be cause for alarm, as normally it was used for twice-yearly updates. The timer on it warned him that it was not time for a standard update, and he bypassed it. Only a few other sects generally reported back, and they would not have anyone available to speak with immediately, but a message would be left for all that wished to listen.
Sith had returned to start another war, and the Jedi would not sit by idle.
The first sign of war for most of the galaxy was not a clash between the Republic's new clone army and the Separatist's droid army, but instead the sudden movement of large ships from across the galaxy. An army that dwarfed the combined Republic and Separatist armies had come together, seemingly out of nowhere, all bearing the freshly-painted symbols of the old Jedi Lords. Those who were even slightly Force sensitive felt the combined meditation of a million or more Jedi warriors tearing apart all attempts by the Dark Side to hide the Sith, and then the army moved.
To the shock of the Republic, half the army descended on Coruscant and took Supreme Chancellor Palpatine into custody, locked down the Senate, and left a team to start going through laws while the army went after blatant corruption in the Republic. The other half of the army crushed the droid armies and corrupt corporate interests, taking Dooku and others into custody.
Less than two hundred total deaths happened in the combat needed to take over as the citizens of the galaxy trembled in fear. Then the trials began, Palpatine revealed as a Sith with multiple apprentices, some of whom had their own apprentices. All of them refused to repent for one reason or another and ended up executed, though it was widely believed that Dooku had done so out of a desire to be punished for falling as he had. Centuries of corruption traced back to the Sith working to undermine the galaxy to take over, laws torn out and rewritten to be fair to the people and not simply those in power. Slavery, including that of the clone army, was outlawed under broader definitions and slavers across the Outer Rim were given the ultimatum to release their slaves or be crushed.
After the first three teams of Mandalorian Jedi dropped on Hutts that refused, the rest of the Outer Rim decided that perhaps slavery was an outdated concept after all.
The Jedi Lords remained in power for a single galactic year, restructuring the galaxy to strip out the Dark Side taint. New elections were held on all planets in the expanded Republic, the new Senators vetted by the Jedi Lords as at least intending to work towards the betterment of the people, and then they handed control back to the Senate and dispersed again. Some paying attention would note that all of the ships the Jedi Lords had used still existed, the new paint stripped off to reveal the older symbols of various 'mercenary' and 'relief' groups across the galaxy. Most would miss that entirely, but the Jedi Lords would become the boogeymen of the underworld. Out there, somewhere, unseen until needed...