Question: Peter Youngblood Hills had a role in the 2001 American war drama based on whose 1992 book?

Context paragraphs:
The Great Elephant Chase: The Great Elephant Chase is a 1992 book children's novel by British author Gillian Cross.  It won the Nestlé Smarties Book Prize and the Whitbread Children's Book Award.  It takes place around the end of the nineteenth century, although a specific year is never stated.  It follows the adventures of teenagers Tad and Cissy, as they travel across America with Khush the elephant.  The book is mainly written in third person narrative from Tad's point of view, but also contains epistolary segments, consisting of letters from Cissie to her friend Ketty, towards whose home they are travelling.

Peter Youngblood Hills: Peter Youngblood Hills (born 28 January 1978) is an Anglo-American actor.  He is perhaps best known for his supporting role of SSgt.  Darrell "Shifty" Powers in HBO’s World War II mini-series, "Band of Brothers".

Give War a Chance: Give War a Chance is a 1992 book by American writer P J O'Rourke. <ref name="The Independent - 5 September 1992 -BOOK REVIEW / Eating marxism for breakfast: Give war a chance - P J O'Rourke"> </ref>

Band of Brothers (miniseries): Band of Brothers is a 2001 American war drama miniseries based on historian Stephen E. Ambrose's 1992 non-fiction book of the same name.  The executive producers were Steven Spielberg and Tom Hanks, who had collaborated on the 1998 World War II film "Saving Private Ryan".  The episodes first aired in 2001 on HBO.  The series won Emmy and Golden Globe awards in 2001 for best miniseries.

All the King's Men (1999 film): All the King's Men is a feature-length World War I television drama by the BBC starring David Jason, first broadcast on Remembrance Sunday, 14 November 1999.  The film derives its title from a line in the Humpty Dumpty nursery rhyme and is based on a 1992 book, "The Vanished Battalion" by the film's co-producer, Nigel McCrery.

This is Orson Welles: This is Orson Welles is a 1992 book by Orson Welles (1915–1985) and Peter Bogdanovich that comprises conversations between the two filmmakers recorded over several years, beginning in 1969.  The wide-ranging volume encompasses Welles's life and his own stage, radio and film work as well as his insights on the work of others.  The interview book was transcribed by Bogdanovich after Welles's death, at the request of Welles's longtime companion and professional collaborator, Oja Kodar.  Welles considered the book his autobiography.

Horse Soldiers (film): Horse Soldiers is an upcoming 2018 American war drama film directed by Nicolai Fuglsig and written by Peter Craig and Ted Tally, based on Doug Stanton's non-fiction book of same name, about the CIA paramilitary officers and U.S. Special Forces sent to Afghanistan right after the September 11 attacks.  The film stars Chris Hemsworth, Michael Shannon, Michael Peña, Austin Stowell, Trevante Rhodes, and Rob Riggle.

We Were Soldiers Once… and Young: We Were Soldiers Once… and Young is a 1992 book by Lt. Gen. Harold G. Moore (Ret.)  and war journalist Joseph L. Galloway about the Vietnam War.  It focuses on the role of the First and Second Battalions of the 7th Cavalry Regiment in the Battle of the Ia Drang Valley, the United States' first large-unit battle of the Vietnam War; previous engagements involved small units and patrols (squad, platoon, and company sized units).  It was adapted into the 2002 film "We Were Soldiers".

Darrell Powers: Staff Sergeant Darrell C. "Shifty" Powers (13 March 1923 – 17 June 2009) was a non-commissioned officer with Easy Company, 2nd Battalion, 506th Parachute Infantry Regiment, in the 101st Airborne Division during World War II.  Powers was portrayed in the HBO miniseries "Band of Brothers" by Peter Youngblood Hills.

A Midnight Clear: A Midnight Clear is a 1992 American war drama film written and directed by Keith Gordon and starring an ensemble cast that features Ethan Hawke, Gary Sinise, Peter Berg, Kevin Dillon and Arye Gross.  It is based on the eponymous novel by William Wharton.  Set towards the end of World War II, the film tells the story of an American intelligence unit which finds a German platoon that wishes to surrender.

Supporting paragraphs: Peter Youngblood Hills Band of Brothers (miniseries)
Answer: Stephen E. Ambrose