Final answer:
The military determines their location by using historical methods such as postal-station systems and modern technology like GPS, which provides precise positioning for effective strategy and logistics.
Step-by-step explanation:
The military can determine their location by using various means such as traditional signs and signals, postal-station systems, and modern technologies like the Global Positioning System (GPS). In historical contexts, postal-station systems were set up to aid in the transmission of official mail and provided a network for travelers to gauge their location, much like waypoints. Today, GPS technology, using satellites in Earth's orbit, allows for precise positioning and navigational assistance, which is crucial for military operations, including the movement of troops and supplies.
Understanding the importance of knowing the enemy and knowing oneself was crucial in old military strategies as well as in modern tactics. Accurate location knowledge is pivotal to ensure not only a positional advantage but also to maintain logistical support. Equipments such as metal detectors are used along with GPS to ensure the safety and effectiveness of military personnel.