I am just one settlement away from finishing my first campaign, playing as the Carthaginians. I have only to take Sidon and I sould have completed my victory conditions.

However, having purchased Sidon from the Seleucids nothing happens. I own all the other territories I need to and a also occupy the territories I need to raid. Do you need to take your final settlement by force (got a veteran army of Libyans waiting off the coast in case) or am I doing something very wrong?