Why are all oasis consider neutral ground for all battles?

An Oasis has almost no tactical advantages for battles, due to wildlife interfering with most of the units. If two sides were to battle at an oasis, the side with the most experienced units/legions would assure victory.  

Explanation:

invention of the washing machine

in the past, people used sticks and stones or scrub boards to clean their clothing. as it was sweaty, backbreaking work, we owe a world of to james king because he created the model for the modern washing machine in 1851. the most important issue was that this machine cleaned clothes while a person cranked the handle. doing this made people who used it develop strong muscles in their arms. later, in 1908, alva j. fisher created an electric washing machine named thor. this one was not the first automatic washing machine. however, it was one of the most popular models at the time.