Publius Licinius Crassus was one of two sons of Marcus Licinius Crassus, the so-called "triumvir", and Tertulla, daughter of Marcus Terentius Varro Lucullus. He belonged to the last generation of Roman nobiles who came of age and began a political career before the collapse of the Republic. His peers included Marcus Antonius, Marcus Junius Brutus, Decimus Junius Brutus Albinus, the poet Gaius Valerius Catullus, and the historian Gaius Sallustius Crispus.

Ariovistus was a leader of the Suebi and other allied Germanic peoples in the second quarter of the 1st century BC. He and his followers took part in a war in Gaul, assisting the Arverni and Sequani in defeating their rivals, the Aedui. They then settled in large numbers into conquered Gallic territory, in the Alsace region. They were defeated, however, in the Battle of Vosges and driven back over the Rhine in 58 BC by Julius Caesar.