Final answer:
The subject of this question is Social Studies, which covers the order and discipline within the army. The question is likely referring to a specific set of rules for soldiers. Understanding the hierarchy and rules within the military is important in Social Studies.
Step-by-step explanation:
The subject of this question is Social Studies because it pertains to the order and discipline within the army. The question seems to be referring to a specific order or set of rules for soldiers. These rules may include saluting officers and colors, obeying special orders, and repeating calls from posts.
In the context of Social Studies, understanding the hierarchy, discipline, and rules within the military is important for understanding how armies operate. This knowledge is often covered in high school Social Studies courses that focus on government, history, and civic responsibilities.