Question: Matthew Settle is known for his role on Band of Brothers as what United States Army officer who served in the 506th Parachute Infantry Regiment of the 101st Airborne Division during World War II?

Context paragraphs:
Edward Shames: Colonel Edward D. Shames (born June 13, 1922) is a retired United States Army enlisted man and officer who later served in the U.S. Army Reserve.  During World War II he was assigned to the 506th Parachute Infantry Regiment, 101st Airborne Division.  Shames is the last surviving officer of Easy Company, 2nd Battalion, 506th Parachute Infantry Regiment.

Ronald Speirs: Lieutenant Colonel Ronald C. Speirs (20 April 1920 – 11 April 2007) was a United States Army officer who served in the 506th Parachute Infantry Regiment of the 101st Airborne Division during World War II.  He was initially assigned as a platoon leader in B Company of the 1st Battalion of the 506th Parachute Infantry Regiment.  Speirs was reassigned to Dog Company of the 2nd Battalion prior to the invasion of Normandy in June 1944 and later assigned as commander of Easy Company during an assault on Foy, Belgium after the siege of Bastogne was broken during the Battle of the Bulge.  Speirs also served in Korea, where he was assigned both as a rifle company commander and as a staff officer.  He later became the American governor for Spandau Prison in Berlin.  He reached the rank of captain while serving in the European Theater during World War II, major during the Korean War and retired as a lieutenant colonel.  Speirs was portrayed in the television miniseries "Band of Brothers" by Matthew Settle.

506th Airborne Infantry Regiment Association: The 506th Airborne Infantry Regiment Association (Airmobile – Air Assault) is a charitable veterans' organization composed of present and past members and affiliates of a historic U.S Army regiment, the 506th Airborne Infantry Regiment.  For much of its distinguished history since it was formed as the 506th Parachute Infantry Regiment in World War II, the regiment has been associated with the 101st Airborne Division.

501st Infantry Regiment (United States): The 501st Airborne Infantry Regiment, previously the 501st Parachute Infantry Regiment (501st PIR) and later 501st Infantry Regiment, is an airborne forces regiment of the United States Army, with a long history, having served in World War II and the Vietnam War, both as part of the 101st Airborne Division, as well as the War in Afghanistan.  It is the first airborne unit by designation in the United States Armed Forces.  Its 1st Battalion is assigned to the 4th Brigade Combat Team (Airborne), 25th Infantry Division, located at Fort Richardson, Alaska.  Its 2nd Battalion is assigned to the 1st Brigade Combat Team, 82nd Airborne Division, located at Fort Bragg, North Carolina.

Robert L. Strayer: Colonel Robert Lytle Strayer (March 2, 1910 – December 18, 2002) was a United States Army officer during World War II.  As a major, in 1942 he was given command of the 2nd Battalion of the 506th Parachute Infantry Regiment, 101st Airborne Division.  In 1945 he was made Executive Officer (XO) of the 506th PIR.  During his service he earned one Silver Star, four Bronze Stars, and one Purple Heart.  At the end of World War II Strayer was promoted to colonel and appointed commander of the 507th PIR.  When the 506th was de-activated in September 1945, Colonel Strayer left the Army.

Robert B. Brewer: Robert B. Brewer (31 January 1924 – 5 December 1996) was a United States Army officer during World War II, assigned to E Company, 2nd Battalion, 506th Parachute Infantry Regiment, 101st Airborne Division during World War II.  Brewer was portrayed without credit to the actor in one episode of the HBO miniseries "Band of Brothers".

Matthew Settle: Jeffrey Matthew Settle (born September 17, 1969) is an American actor.  He is known for playing Captain Ronald Speirs on the HBO miniseries "Band of Brothers" and Rufus Humphrey on the CW teen drama series "Gossip Girl".

502nd Infantry Regiment (United States): The 502nd Infantry Regiment (502nd INF), previously titled the 502nd Parachute Infantry Regiment (502nd PIR), is an airborne infantry regiment of the United States Army.  The regiment was established shortly after the American entry into World War II, and was assigned as a regiment of the 101st Airborne Division, "The Screaming Eagles", one of the most decorated formations of the U.S. Army.  The regiment saw substantial action in the European Theater of World War II and was deactivated in 1945, shortly after the end of the war.  Reactivating in a new form in 1956, the 502nd Infantry has served in the Vietnam War, the first Gulf War, Operation Iraqi Freedom, Operation Enduring Freedom in Afghanistan, and Operation Inherent Resolve in Iraq.  It was removed from parachute status with the rest of the 101st Airborne Division in 1969, and since 1974, the regiment has been classified as an Air Assault unit.  Currently, its 1st and 2nd battalions are active.  Both battalions are assigned to the 2nd Brigade Combat Team, 101st Airborne Division (Air Assault).

506th Infantry Regiment (United States): The 506th Infantry Regiment, originally designated the 506th Parachute Infantry Regiment (506th PIR) during World War II, is an airborne light infantry regiment of the United States Army.  Currently a parent regiment under the U.S. Army Regimental System, the regiment has two active battalions: the 1st Battalion, 506th Infantry Regiment (1-506th) is assigned to the 1st Brigade Combat Team, 101st Airborne Division, and the 2nd Battalion, 506th Infantry Regiment (2-506th) is assigned to the 3rd Brigade Combat Team, 101st Airborne Division.

Robert Sink: Lieutenant General Robert Frederick Sink (April 3, 1905 – December 13, 1965) was a senior United States Army officer who fought during World War II, the Korean War, and early parts of the Vietnam War, though he was most famous for his command of the 506th Parachute Infantry Regiment, part of the 101st Airborne Division, throughout most of World War II, in France, Holland and Belgium.  Sink was portrayed in the television miniseries "Band of Brothers" by Captain Dale Dye.

Supporting paragraphs: Matthew Settle Ronald Speirs
Answer: Lieutenant Colonel Ronald C. Speirs