Contributed by David Verne
The Frisii, a Germanic tribe in what is currently the Netherlands, has besieged Flevum, a Roman border town. The governor of Lower Germany gathers an army and drives the Frisii off. After building a series of roads and bridges to transport his soldiers and supplies, he marches across the Rhine and defeats the Frisii, but Roman casualties are high, a reported 1,300 dead. Tiberius and Sejanus keep the amount secret so as not to alarm the populace. The Frisii sue for peace and manage to avoid conquest by offering a large tribute. 
- Tacitus. Annals.