[x] End the course of operations: you've burned the brigade out. One infantry regiment reduced to shreds, one armor regiment reduced to infantry, your artillery is wearing out from constant use, and you personally are barely holding it together. Keep going much longer and the fatigue and schedule slips are going to start turning a lot of your temporary, easily recovered casualties into people risking the long count timer of death.
[X] Launch one last push. You won't be going at it hard, but Rime is right fucking there and cut off. The Navy's second wave should have landed and enacted a naval blockade to help thin the supply out, the road is thoroughly blocked, and this isn't a refinery town. You can probably hammer through it if you press-gang enough people into being spare artillerymen, and you don't need to take it: just knock down the town hall!