The Canal of Drusus (Latin: Fossa Drusiana) was a Roman canal constructed for military purposes by Nero Claudius Drusus around 12 BC. It is believed to have linked the Rhine delta with the Lake Flevo, (today's IJsselmeer). It facilitated troop transport to the north, avoiding the need to cross the open North Sea. This was of strategic importance for attacks on the Germanic people living on the Frisian coasts and along the Elbe estuary in the German Bight. Drusus' son Germanicus used the canal dug by his father's army in a military campaign some decades later.