The left hand side of the Trebbia River is the location of the Battle of the Trebia.
 It is one of the four main right-bank tributaries of the river Po, the other three being the Tanaro, the Secchia and the Panaro
== Cultural history ==Judging from the archaeological evidence, the Trebbia valley has been continuously occupied since the end of the Acheulian in the Paleolithic, about 150000 years ago

