Marcus Lollius in the context of "Roman campaigns in Germania (12 BC – AD 16)"

The Roman campaigns in Germania (12 BC – AD 16) were a series of conflicts between the Germanic tribes and the Roman Empire. Tensions between the Germanic tribes and the Romans began as early as 17/16 BC with the Clades Lolliana, where the 5th Legion under Marcus Lollius was defeated by the tribes Sicambri, Usipetes, and Tencteri. Roman Emperor Augustus responded by rapidly developing military infrastructure across Gaul. His general, Nero Claudius Drusus, began building forts along the Rhine in 13 BC and launched a retaliatory campaign across the Rhine in 12 BC.

Drusus led three more campaigns against the Germanic tribes in the years 11–9 BC. For the campaign of 10 BC, he was celebrated for being the Roman who traveled farthest east in northern Europe. Succeeding generals would continue attacking across the Rhine until AD 16, notably Publius Quinctilius Varus in AD 9. During the return trip from his campaign, Varus' army was ambushed and almost destroyed by a Germanic force led by Arminius at the Battle of the Teutoburg Forest; Arminius was the leader of the Cherusci, had previously fought in the Roman army, and was considered by Rome to be an ally. Roman expansion into Germania Magna stopped as a result, and all campaigns immediately after were in retaliation of the Clades Variana ("Varian Disaster"), the name used by Roman historians to describe the Battle of the Teutoburg Forest, and to prove that Roman military might could still overcome German lands. The last general to lead Roman forces in the region during this time was Germanicus, the adoptive son of Emperor Tiberius, who in AD 16 had launched the final major military expedition by Rome into Germania.

The clades Lolliana or Lollian disaster was a battle in 16 BC, when the consul Marcus Lollius was defeated by the Sicambri, Usipetes and Tencteri, Germanic tribes who had crossed the Rhine. This defeat is coupled by the historian Suetonius with the disaster of Publius Quinctilius Varus in the Battle of the Teutoburg Forest.

After capturing and crucifying Romans in their own lands, the three Germanic tribes crossed the Rhine and plundered Roman territory. Roman cavalry were ambushed and routed. While pursuing the cavalry, the Germani came across the Roman governor Lollius and defeated him as well. They captured the eagle of the fifth legion. When Lollius and Augustus began to assemble armies, the Germani retreated back to their own lands, made peace and gave hostages.