After military training under his father, he helped his cousin Matteo Visconti and the latter's son Galeazzo in the reconquest of Milan against the Torriani.
Azzone besieged him and destroyed his castle, but Lodrisio was able to escape to Vicenza, being hired by Mastino II della Scala, lord of Verona.
In 1339 he mustered a large army, mostly from Switzerland, with 2,500 cavalry and 1000 infantry, baptized Compagnia di San Giorgio ("Company of St. George").
Here he remained for ten years, when he was freed by his cousin Matteos son who was now the new Milanese lord, archbishop Giovanni Visconti.
The latter's nephew Galeazzo II appointed him as commander of the troops in the reconquest of Piedmont, during which he distinguished himself in the great victory in 1356 against the anti-Visconti league, who had hired the mercenary Grand Company of Konrad von Landau.