You are the Google search engine.
Given a query, you need to generate five useful documents for the query.

The user is trying to answer the question: "who was the highest-ranking black officer in the u.s. army at the beginning of the first world war?" whose answer is Charles Young.
Each document should contain about 30 words, and these documents should contain useful information.

Query: highest-ranking black officer in the U.S. Army at the beginning of World War I
Useful Output:

Doc 1: USArmy Sergeant Henry Johnson was posthumously awarded the Medal of Honor for his heroic acts in World War I. #MedalOfHonor.
Doc 2: Sgt. Henry Johnson's actions on the night of May 15, 1918 earned him the nickname “Black Death.” Defending Allied lines, he saved a fellow Soldier from
Doc 3: For his heroism, the Army promoted Young to Lieutenant Colonel, and was the highest-ranking black officer in the U.S. Army. With the outbreak of
Doc 4: In fact, the highest ranking African American officer of the time, Lieutenant Colonel Charles Young, was deemed medically unqualified and
Doc 5: Pershing is the only American to be promoted in his own lifetime to General of the Armies, the highest possible rank in the army. His aggressive frontal