Since Berengar and his Army had departed from Parma, over a month had passed, various siege camps were set up encircling the City of Florence where the Emperor and the Medicis resided. The Austrian's encampment greatly resembled an elaborate trench line straight out of the pictures from the Great War during Berengar's previous life.
During this time, nobody was allowed to enter the city. However, Berengar had successfully exfiltrated his agents trapped in the town. It took some effort, but they were retrieved from their position without incident before the Austrian bombardment had begun.
After retrieving his agents, The Royal Austrian Army's cannons fired off shells at an arc, landing over the city walls and into the city, bombarding the inhabitants within. With the hundreds of thousands of people who had evacuated to the town of Florence, Berengar knew it was a matter of months before their food supply dwindled and the people began to starve.