The best description regarding Baron Friedrich von Steuben would be "<span>a. a former Prussian captain who turned a disorderly Continental Army into a skilled fighting force," although he was also involved in the Battle of Yorktown. </span>
The correct answer to this open question is the following.
Although the question is incomplete because it does not provide any map for reference, we can say that the Tigris River and the Euphrates River are found in the Middle East region, in what today is Bagdad, Iraq. The mountains close to this Tigris-Euphrates River System are called the Taurus Mountains. The Tigris River starts in Turkey, crosses Iraq, and ends in the Persian Gulf. The Euphrates River also starts in Turkey, crosses Syria, then Iraq, and joins the Tigris River before ending in the Persian Gulf. These two rivers are very symbolic in the history of humanity because the Sumerians settled in the middle of both rivers. They are considered by historians as the oldest civilization of planet Earth.
Early in the twentieth century rapid economic and technological change increasing competition among powerful states.
