In 1464 he abandoned the studies for the military career, following his father against the papal army led by Alessandro Sforza.
He was named to the lucrative post of commissary general of the papal army.
In October 1766, he was made commissary general of the papal army.
A main, but not the only element, of the papal army was the Swiss Guard.
The principal function of the Chancellor was founded originally to collect money to maintain the papal armies.
The object of the mission was to bring about a mutual understanding and prevent the failure of the papal army against the Hussites.
Significantly, the crenellations were removed in 1610, when Perugia had submitted at last to papal armies.
He justified this to Geneva as a protection against papal armies.
There was no longer a papal army to oppose him, and the march southward proceeded unopposed.
Gherardo (1512-1600), colonel of the papal army, a famous naturalist.