Complex sentence: Licinius Crassus was appointed proconsul for the following year by the Senate; he was presumably relieved of his duties in 203 BC when Hannibal evacuated all his troops back home.
Split into simpler sentences: Licinius Crassus was appointed proconsul for the following year by the Senate. Je was presumably relieved of his duties in 203 BC, when Hannibal evacuated all his troops back home.