What does the acronym "HE" stand for in mortar terminology?

In mortar terminology, "HE" stands for High Explosive. High Explosive munitions are designed to maximize the amount of explosive energy released upon detonation, producing a significant blast effect and fragmentation. This type of ammunition is commonly used in military applications to inflict damage on targets, such as enemy personnel or equipment. Understanding the characteristics and applications of High Explosive rounds is crucial for accurate mortar employment and for effectively supporting infantry operations on the battlefield.

The other options, while they might seem plausible, do not accurately represent the terminology used in military contexts related to mortars. Heavy Equipment refers to machinery used in construction and logistics, High Energy describes a category of materials or reactions but is too vague in this context, and High Efficiency does not pertain specifically to the explosive capabilities of mortar munitions.