Question: The city where the 10th Regiment Massachusetts Volunteer Infantry was organized is in what Massachusetts county?

Context paragraphs:
Frederick C. Anderson: Frederick Charles Anderson (March 24, 1842 – October 6, 1882) was a Union Army soldier in the American Civil War who received the United States military's highest decoration, the Medal of Honor.  Born in Boston, Massachusetts, and orphaned at a young age, Anderson was adopted by a farming family in rural Raynham.  He enlisted in the Union Army shortly after the start of the war and, as a private in the 18th Regiment Massachusetts Volunteer Infantry, participated in several major battles, including Antietam, Fredericksburg, Chancellorsville, and Gettysburg.  He was awarded the Medal of Honor for capturing a Confederate battle flag during the Battle of Globe Tavern on August 21, 1864.  Transferred to the 32nd Regiment Massachusetts Volunteer Infantry and wounded in the Siege of Petersburg, he returned to the field in time to witness the Confederate surrender at Appomattox Court House.  After the war, he returned to Massachusetts, working and raising a family until his sudden death at age 40.

10th Regiment Massachusetts Volunteer Infantry: The 10th Regiment Massachusetts Volunteer Infantry was a regiment of infantry in the Union Army during the American Civil War.  Organized at Hampden Park in Springfield, Massachusetts in the early summer of 1861 and consisting mostly of men from western Massachusetts, the regiment was mustered in on June 21, 1861.  It was originally led by Colonel Henry Shaw Briggs, an attorney and prominent citizen of Pittsfield, Massachusetts.

38th Regiment Massachusetts Volunteer Infantry: The 38th Regiment Massachusetts Volunteer Infantry was an infantry regiment in the Union Army during the American Civil War.  Companies A, B, and C organized at Camp Cameron in Cambridge, Massachusetts in July and August 1862.  The remaining seven companies were organized at Camp Stanton in Lynnfield, Massachusetts and mustered into service from August 20 to 22.  Colonel Timothy Ingraham initially commanded the regiment.

29th Regiment Massachusetts Volunteer Infantry: The 29th Regiment Massachusetts Volunteer Infantry was an infantry regiment in the Union army of the United States during the American Civil War.  The regiment was organized in December 1861 when three new companies were attached to a battalion of seven Massachusetts companies that had been in active service since May 1861.  These seven companies had been recruited to fill out the 3rd Massachusetts and 4th Massachusetts regiments and had signed on for three years of service.  When the 3rd and 4th Massachusetts were mustered out in July 1861, the seven companies that had signed on for three years were grouped together to form a battalion known as the Massachusetts Battalion.  Finally, in December 1861, three more companies were added to their roster to form a full regiment and the unit was designated the 29th Massachusetts.

12th Regiment Massachusetts Volunteer Infantry: The 12th Regiment Massachusetts Volunteer Infantry was an infantry regiment in the Union army during the American Civil War.  It was formed on June 14, 1861, in Boston, Massachusetts.  Its original commander was Colonel Fletcher Webster, son of the famed U.S. Senator from Massachusetts, Daniel Webster.  The unit was known as the "Webster Regiment" after its first colonel.

54th Massachusetts Infantry Regiment: The 54th Regiment Massachusetts Volunteer Infantry was an infantry regiment that saw extensive service in the Union Army during the American Civil War.  The unit was the first African-American regiment organized in the northern states during the Civil War.  Authorized by the Emancipation Proclamation, the regiment consisted of African-American enlisted men commanded by white officers.

Camp Meigs: Camp Meigs is a former American Civil War training camp that existed from 1862 to 1865 in Readville, Massachusetts.  It existed near the former Camp Brigham and Camp Massasoit and trained the 54th Regiment Massachusetts Volunteer Infantry, among others.  The 54th regiment was one of the first official African-American units in the United States during the Civil War.

11th Regiment Massachusetts Volunteer Infantry: The 11th Regiment Massachusetts Volunteer Infantry was an infantry regiment in the Union Army during the American Civil War.  Organized in Boston in May 1861, the 11th Massachusetts was made up mostly of men from Boston, but also from Charlestown and Dorchester.  The leading force behind the formation of the regiment was its first colonel, George Clark, Jr., who had been an officer in the Massachusetts state militia.  The regiment was known as the "Boston Volunteers."

43rd Regiment Massachusetts Volunteer Infantry: The 43rd Regiment Massachusetts Volunteer Infantry was a regiment of infantry that served in the Union Army during the American Civil War.  The unit was first formed in September 1862 in response to President Abraham Lincoln's call for 300,000 men to serve for nine months.  The nucleus of the regiment was the Second Battalion Massachusetts Volunteer Militia, a unit dating to 1798 known as the Boston Light Infantry and nicknamed the "Tigers."  The 43rd Massachusetts therefore became known as the "Tiger Regiment."

Springfield, Massachusetts: Springfield is a city in western New England, and the seat of Hampden County, Massachusetts, United States.  Springfield sits on the eastern bank of the Connecticut River near its confluence with three rivers: the western Westfield River, the eastern Chicopee River, and the eastern Mill River.  As of the 2010 Census, the city's population was 153,060.  Metropolitan Springfield, as one of two metropolitan areas in Massachusetts (the other being Greater Boston), had a population of 692,942 as of 2010.

Supporting paragraphs: 10th Regiment Massachusetts Volunteer Infantry Springfield, Massachusetts
Answer: Hampden County