What term does Mr. Milling use to describe what Emmie and her friend did to avoid Dawn?

Mr. Milling uses the term "Testudo" to describe the actions of Emmie and her friend as they avoided Dawn. The word "Testudo" is a reference to a Roman military formation where soldiers would align their shields to form a protective barrier, resembling a tortoise shell. This concept highlights the idea of creating a protective strategy to navigate a challenging situation or opposition, which in this case is Dawn. By referring to their actions in this way, Mr. Milling emphasizes the teamwork and strategic planning Emmie and her friend employed to maintain their safety and avoid confrontation. This connection to historical tactics provides a vivid image of their actions, encapsulating the idea of unity and protection in adversity.