After the outbreak of the civil war he commanded the Pompeian troops at Corfinium, but was obliged to surrender.
The park also includes the Charlottenhof, a reproduction of a Pompeian villa.
In 48 B.C. during the civil war he commanded his father's fleet in the Adriatic. After the battle of Pharsalus he set out for Africa with the remainder of the Pompeian party, but, meeting with little success, crossed over to Spain.
A large additional space for exhibits was made in 1904, when the western half of the second floor was added, and the building as now arranged contains the large bronzes and statues on the ground floor; a gallery of Pompeian frescoes in the entresol; the library, picture gallery and small bronzes on the first floor; and the glass, jewelry, arms, papyri, gems, and the unique collection of ItaloGreek vases, on the second floor.
In the conflict between Caesar and the Pompeian party Varro was more than once actively engaged.