Battle of the Teutoburg Forest
The Romans set up a fortified night camp and the next morning broke out into open country, near the modern town of Ostercappeln. The break-out cost them heavy losses, as did a further attempt to escape by marching through another forest area, with heavy rains continuing. The rain stopped them from using their bows because sinew strings become slack when wet, which left them virtually defenceless, as their shields also became waterlogged.