He was thus obliged to return to Rome with all expedition; but he set out the following day, attended by a guard of armed men, and arrived at Pisa on the 20th of April.
From Pisa he went to Parma, to see his friend Azzo Correggio, and soon after his arrival he was witness to a revolution in that city of which Azzo had the principal direction.

The Scalas, who held the sovereignty of Parma, had for some time oppressed the inhabitants with exorbitant taxes, which excited murmurs and seditions.

The Correggios, to whom the city was entrusted in the absence of Mastino della Scala, profited by the public discontent, hoisted the flag of liberty, and, on the 22nd of May, 1341, drove out the garrison, and made themselves lords of the commonwealth.

On this occasion, Azzo has been accused of the worst ingratitude to his nephews, Alberto and Mastino.

But, if the people were oppressed, he was surely justified in rescuing them from misgovernment.
To a great degree, also, the conduct of the Correggios sanctioned the revolution.