Battle of the Teutoburg Forest
Segestes, the father of Arminius' wife and opposed to the marriage, warned Varus about Arminius. The night before the Roman forces had left, he suggested that Varus should arrest Arminius and several other Germanic leaders. He must have known that they were plotting an uprising. Varus dismissed the advice as motivated by a personal feud. Arminius then left by saying that he would drum up Germanic forces to support the Roman campaign. Instead, he led his troops, who must have been waiting nearby, in attacks on surrounding Roman garrisons.