Contributed by David Verne
The governor of Britain, Agricola, has spent the last five years subduing Wales and also marches into Scotland almost unopposed. This year he raises a fleet and establishes a large fort north of modern day Perth. The Caledonians, the Scots, are a loose collection of tribes and haven't put up much resistance. A chieftain named Calgacus manages to unite many of the tribes to fight off the Romans, and in the middle of the night attack the fort, which is garrisoned by the 9th Hispana. The Caledonians burst into the fort and desperate hand to hand fighting continued for some time. Agricola received word and was able to relieve the garrison with cavalry reinforcements, preventing the possible destruction of the legion. He responds to this attack by pushing further north but is hampered by Domitian, who redeploys a several units from Britain to Gaul. Domitian is officially in Gaul to take a census but is actually on a mission to gain military glory of his own.   
- Wikipedia Contributors. Legio IX Hispana.
- Wikipedia Contributors. Gnaeus Julius Agricola.
- Duncan, Mike (November 15, 2009). 74- Friends, I Have Wasted a Day.