Francesco I Sforza
Borso followed an expansionist policy for his state, and one of ennobling for his family. He was generally allied with the Republic of Venice, and enemy both to Francesco I Sforza and the Medici family. These rivalries led to the indecisive Battle of Molinella. He was in general appreciated by his subjects. One cause of grievance was his project to build a mountain from scratch in 1471— a folly he was later forced to abandon.