Question: Who is the mother-in-law of Princess Frederica Charlotte Of Prussia?
Sentence (from "Prince Frederick, Duke of York and Albany"): Later, as Commander-in-Chief during the Napoleonic Wars, he oversaw the reorganisation of the British Army, establishing vital structural, administrative and recruiting reforms for which he is credited with having done "more for the army than any one man has done for it in the whole of its history."
Relevant evidence: No