The advantages of high ground
A) slightly more exposed surface area on the lower target, since altitude gives you a chance to hit the top of the target
B) explosives are more effective since there is more exposed ground around the target to hit
C) whoever is on low ground may have to look in to the sun*
D) gravity has a higher effect on upward moving projectiles compared to those being fired downward*
*not a factor in coh
Just a clarification on point D
The gravity of Earth, denoted
g, refers to the acceleration that the Earth imparts to objects on or near its surface. It has an approximate value of 9.81 m/s2, which means that, ignoring the effects of air resistance, the speed of an object falling freely near the Earth's surface will increase by about 9.81 metres (32.2 ft) per second every second.
Gravity decreases with altitude as one rises above the earth's surface because greater altitude means greater distance from the Earth's center. All other things being equal, an increase in altitude from sea level to 9,000 metres (30,000 ft) causes a weight decrease of about 0.29%. (An additional factor affecting apparent weight is the decrease in air density at altitude, which lessens an object's buoyancy.[8] This would increase a person's apparent weight at an altitude of 9,000 metres by about 0.08%)