Complex sentence: Alvinczi's advance guard under GM Friedrich of Hohenzollern-Hechingen pressed toward Verona where he bumped into Massena on 11 November, and was forced to pull back.
Split into simpler sentences: Alvinczi's advance guard under GM Friedrich of Hohenzollern-Hechingen pressed toward Verona. Near that city, he bumped into Masséna on 11 November and was forced to pull back.