I remember one battle rather well; I had a single Town Watch (playing as the Brutii) stationed in... Apollonia, I believe, and an absolutely massive Greek Cities army laid siege to it.
There was no time to get another army to lift the siege, as I was rather busy with wars elsewhere and by the time I could get my closest army there, the city would already have surrendered out of starvation.
There were two options: let my city starve and eventually lose it to the Greeks after my people have suffered for two years, or go out with a bang and try to deal as much damage as I possibly could.
Of course, I chose the latter.
My 80-odd Town Watch stand in front of the city gates. Their captain gives them a final speech in the hopes of boosting their morale. It doesn't work. the Greek army, composed primarily of Militia Hoplites, Hoplites and Peltasts is positioned in a far corner of the map, in a defensive position. They had obviously overestimated my force.
I send my men out of the gates, them having presumably said farewell to their loved ones, and instructed them to march toward the enemy, but stay just out of range of their peltasts.
The gates swing open and they slowly begin what will probably be their final march. After a while, they are in position opposite the massive Greek army. Their hoplites' spears point menacingly toward the Town Watch.
Neither side makes a move. I try to devise a plan to flank them. I can't think of anything.
Eventually I come up with a plan I doubt would work: phalanx' are difficult to maneuver. My Town Watch may be able to simply run around them.
Knowing that against these odds I couldn't possibly win, even with the greatest strategy ever, (this is, after all, Rome: Total war, not Lord of the Rings) I decide that I might as well give it a try. My men start running to their right. The Greeks are obviously not expecting this move, as by the time they even start rearranging themselves, my Town Watch are already in close combat with a group of peltasts. By the time they're done with the peltasts, I had lost quite a few men, and the phalanxes were once again facing my men.
I try the same tactic, and for some reason it works again. This time I target a unit of militia hoplites. However, I am soon surrounded by other (militia) hoplites. My men now only had a narrow passage of escape, with spears on either side and .
Realizing that this is the end, my men desperately start hacking their way through any Greek they see. Their captain sounds his horn one last time before engaging 3 hoplites in battle, killing 2 and finally falling to the third's blade. Only 5 men remain. 4. 3... 2. The last one is able to stab a militia hoplite before he too finally meets his fate.
Thus ends the Battle of Apollonia. Ultimately, the last stand was pointless; the Greek armies were retrained and back to their original numbers within half a year.
However, these 80-odd men, led by captain Whats-his-name went down in (my) history as true Roman heroes.