 Complete the following phrase:  Most of the fortresss major buildings were still being maintained in the second half of the 4th century and the barracks were still inhabited. Up to 383 soldiers at Chester were being paid by coins from the imperial mints; after this the soldiers may have been removed by Magnus Maximus when he invaded Gaul in 383. The Notitia Dignitatum, written in around 395, does not record any military units garrisoned at Deva, indicating the fortress was no longer used by the military at this stage. If it was still used by the military, this would have ended by 410 when the Romans 