In 1528 Tantallon was besieged by James V with two large cannons and 20,000 men. The castle was equipped with its own artillery and held the enemy off for twenty days. It was acquired by James V a year later by negotiations. He strengthened the defenses to fend off artillery attacks. (Castle of the Week description)
---sorry i just didn't know where to put the artillery units the castle used to defend it with so to be fair I didn't give James V the 2 cannons.---
Briefing is in the game when downloaded and have fun!