alternatehistory.com

Instead of Stilicho founding this successor state, what if the POD was much later, in 407. Constantine III fails to invade Gaul due to poor weather conditions in the English Channel and is forced to stay in Britannia. He would have access to an army of 120 thousand including families. This is enough to control the province if managed correctly, assuming relatively peaceful relationships with tribes. However, his main problems would be the declining economy (although this could be revived with a continuation of coin minting) and troop loyalty. Before his nomination, the army had nominated two other leaders and killed them for failing to act to prevent the barbarian crossing into Gaul in 406/7. If Constantine managed to provide a sense of security to the Roman army and their families in Britain, maybe by making treaties with tribes in the north and refortifying Hadrian’s Wall, would he still face likely assassination from them if he did not invade the mainland western empire?