Question: Florence Reece, was an American social activist, poet, and folksong writer, and is best known for the song "Which Side Are You On?", which she wrote in which year, during the Harlan County War, or Bloody Harlan, was a series of coal mining-related skirmishes, executions, bombings, and strikes (both attempted and realized) that took place in Harlan County, Kentucky, during the 1930s?

Context paragraphs:
Harlan County War: The Harlan County War, or Bloody Harlan, was a series of coal mining-related skirmishes, executions, bombings, and strikes (both attempted and realized) that took place in Harlan County, Kentucky, during the 1930s.  The incidents involved coal miners and union organizers on one side and coal firms and law enforcement officials on the other.  The question at hand: the rights of Harlan County coal miners to organize their workplaces and better their wages and working conditions.  It was a nearly decade-long conflict, lasting from 1931 to 1939.  Before its conclusion, two acclaimed folk singers would emerge, state and federal troops would occupy the county more than half a dozen times, an indeterminate number of miners, deputies, and bosses would be killed, union membership would oscillate wildly, and workers in the nation's most anti-labor coal county would ultimately be represented by a union.

Cawood, Kentucky: Cawood is a census-designated place (CDP) and coal town in Harlan County, Kentucky, United States.  The population was 731 at the 2010 census.

Kentenia, Kentucky: Kentenia is an unincorporated community and coal town in Harlan County, Kentucky, United States.  Kentenia was served by a post office from 1917 to 1930.

Walter Skidmore: Walter Dennis Skidmore (November 19, 1903 – April 13, 1993) was an American basketball coach.  he was best known for being the head coach of the North Carolina Tar Heels men's basketball team from 1935 through 1939.  Skidmore had a record of 65–25 with the Tar Heels and led his team to win the Southern Conference Tournament in 1936 and Southern Conference regular season championship in 1938.  In his last year of coaching, Skidmore coached George Glamack who went on to become a star player at North Carolina.  Skidmore took over coaching after Bo Shepard left as head coach due to health problems.  Skidmore was a native of Harlan County, Kentucky, and the son of a coal miner.  He attended Centre College in Kentucky, graduating in 1926.  Before becoming the head basketball coach at North Carolina, Skidmore had coached the North Carolina junior varsity and Charlotte High School teams.  He retired from coaching in 1939 and moved to Letcher County, Kentucky.  From 1955 to 1970, Skidmore operated the Tar Heel Motel in Clinton, North Carolina.  In April 1993, Skidmore died in Chapel Hill, North Carolina, at age 89.

Florence Reece: Florence Reece (1900–1986) was an American social activist, poet, and folksong writer.  She is best known for the song ""Which Side Are You On? "" which she wrote in 1931 during the Harlan County strike.

Harlan County, USA: Harlan County, USA is a 1976 Oscar-winning documentary film covering the "Brookside Strike", an effort of 180 coal miners and their wives against the Duke Power Company-owned Eastover Coal Company's Brookside Mine and Prep Plant in Harlan County, southeast Kentucky in 1973.  Directed and produced by Barbara Kopple, who has long been an advocate of workers' rights, "Harlan County, U.S.A." is less ambivalent in its attitude toward unions than her later "American Dream", the account of the Hormel Foods strike in Austin, Minnesota in 1985-86.

Kentenia State Forest: Kentenia State Forest is a state forest in Harlan County, Kentucky, United States.  It became Kentucky's first state forest in 1919 when the land was donated to the state by the coal company Kentenia-Cantron.  The land is scattered across seven tracts on the south side of Pine Mountain.

Which Side Are You On?: "Which Side Are You On?"  is a song written in 1931 by Florence Reece, the wife of Sam Reece, a union organizer for the United Mine Workers in Harlan County, Kentucky.

Harry Simms (labor leader): Harry Simms (December 25, 1911 – February 11, 1932), born Harry Simms Hersh, was a Jewish American labor leader from Springfield, Massachusetts.  He was sent by the National Miners Union to Harlan County, Kentucky during the Harlan County War to organize the mine workers there.

Jim Garland: Jim Garland (April 8, 1905 – September 6, 1978) was a songwriter from the coal mining country of eastern Kentucky, where he was involved with the communist-led National Miners Union (NMU) during the violent labor conflicts of the early 1930s called the Harlan County War.

Supporting paragraphs: Florence Reece Harlan County War
Answer: 1931