What is qualification for commanding officer?

What is the difference between a union and a confederate soldier? What nation issued the five dollar bill found in abraham lincolns pocket when he was shot? How many people were wounded at the Battle of Midway? Which allied country is the largest? How has submarines changed over time? Which country switched from the Central Power to the Allies? When was the first helicopter developed? Why was the zeppelin important in world war 1? Where were the major battles of the world war 2 fought? What type of insurgent approach or coalition may use different approaches at different times applying tactics that take the best advantages of circumstances? How do you leave a troop in battle camp? What long term disadvantage did the US have during World War 2? How many American women were killed during the Vietnam War? How did Syria become independent? What is the differences between navy and marines? Who was responsible for perventing any American ships from being sunk on their way to Europe? What was the world like before nuclear weapons? What is the record for the 1.5 mile run at basic training lackland AFB? What was the best rifle in world war 1? How were conscientious objectors treated?