Short answers, pulled from the story.
The Cimbri and Teutoni incursions into Roman Italy were thrust back in 101 BC. This military conflict occurred during the late 2nd century BC when migrating Germanic tribes faced armies of the Roman Republic led by Consul Gaius Marius.
The surprise attack on the Romans at the Battle of the Teutoburg Forest caused the withdrawal of the Roman frontier to the Rhine. Two provinces west of the Rhine called Germania Inferior and Germania Superior were established at the end of the 1st century.
Germanic tribes who fought against the Romans seized weapons and armor as war spoils instead of receiving them directly from Rome. Archaeological evidence from the huge Illerup Ådal excavation in Denmark shows huge amounts of Roman and Roman inspired arms and equipment with Scandinavian factory seals.
Rome sought to cultivate the Marcomanni and the Quadi to counterbalance their neighbors while maintaining friendly relations apart from short periods of hostilities. The Marcomans held a standing army of 7000 infantry and 4000 cavalry during these diplomatic exchanges.
Two silver cups discovered in a grave in Hoby, Denmark are likely war spoils from the Battle of the Teutoburg Forest in AD 9. These items explain the high number of Roman arms found in Germanic hands despite the embargo on exporting arms to Germanic tribes.