To future runners wanting to do this formable as Senegal:

• A possible time consumer when doing runs for this formable is the city below Gambia's capital. It's the most populous city, and it may take some time if you only use one unit (10k infantry)
• Try to make your troops as close to Gambian cities as possible without triggering the War Declaration block.

I believe that this formable can be done faster than what this run has achieved. Below 1m 40s? I don't know though. Might be near, if not, impossible.

To Verifiers: Consider that this may be 1m 46s, since the time I calculated was 1m 45s 937ms (I might be wrong though