At the beginning of his term in 932, Pietro II cosigned a letter with Marinus Contarini, the Patriarch of Grado, which he sent to the Synod of Erfurt asking for the expulsion from Germany of the Jews who refused to convert to Christianity.

Pietro II began this expansion in the area, notably against the rival city of Comacchio, which he burnt to the ground after it had attacked Venetian ships.

He also expanded the territory of Venice to Istria, by capturing Capodistria (now Koper in Slovenia).

He then received the submission of other Istrian cities thanks to an economic blockade of the area.

[1] He died in 939 and was succeeded by Pietro Participazio (son of Orso II).