 After he had first marched on Rome in 49 BC, he forcibly opened the treasury, although a tribune had the seal placed on it.After the impeachment of the two obstructive tribunes, Caesar, perhaps unsurprisingly, faced no further opposition from other members of the Tribunician College.When Caesar returned to Rome in 47 BC, the ranks of the Senate had been severely depleted, so he used his censorial powers to appoint many new senators, which eventually raised the Senate's membership to 900.