The general decided to take to the only hill overlooking the field of battle that was entirely what?
Options:
- mountain
- flat land
- flat ground
- won
- pit
Step-by-step reasoning process below:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
Battle fields are always on a Flat Ground. By taking on to the hill can be useful in combat. It provides Structural advantages for position of troops and weaponry which could be thrown or fired from above. The answer: flat ground.