This world is not peaceful in every corner. After Tagg's troops approached the southern defense line of Beiyuan City, he ordered his artillery to start a probing attack.
The Tang Army didn't have the luxury to replace all their artillery with self-propelled guns, so the artillery Tagg had at his disposal was relatively outdated.
In order to support the armored clusters on the western side, the Tang Army concentrated almost all of their self-propelled artillery in Redman's troops. This resulted in Tagg's artillery being, in fact, towed guns.
The heavy and clumsy towed howitzers were not quick to advance, but they were reliable and cheap, indeed filling the void left by self-propelled howitzers.
When Tagg's troops pushed 100 155mm caliber howitzers to the frontline, the Tang Army's artillery fire made the opposing Shen Army quite uncomfortable.
