Question: Colonel Joesph Hardin, Sr. joined what group that was composed of American frontiersmen from west of the Appalachian Mountains who took part in the American Revolutionary War?

Context paragraphs:
Congress of the Confederation: The Congress of the Confederation, or the Confederation Congress, formally referred to as the United States in Congress Assembled, was the governing body of the United States of America that existed from March 1, 1781, to March 4, 1789.  A unicameral body with legislative and executive function, it comprised delegates appointed by the legislatures of the several states.  Each state delegation had one vote.  It was preceded by the Second Continental Congress (1775–1781) and governed under the newly adopted "Articles of Confederation and Perpetual Union", which were proposed 1776–1777, adopted by the Continental Congress in July 1778 and finally agreed to by a unanimous vote of all thirteen states by 1781, held up by a long dispute over the cession of western territories beyond the Appalachian Mountains to the central government led by Maryland and a coalition of smaller states without western claims.  The newly reorganized Congress at the time continued to refer itself as the Continental Congress throughout its eight-year history, although modern historians separate it from the earlier bodies, which operated under slightly different rules and procedures until the later part of American Revolutionary War.  The membership of the Second Continental Congress automatically carried over to the Congress of the Confederation when the latter was created by the ratification of the Articles of Confederation.  It had the same secretary as the Second Continental Congress, namely Charles Thomson.  The Congress of the Confederation was succeeded by the Congress of the United States as provided for in the new Constitution of the United States, proposed September 17, 1787, in Philadelphia and ratified by the states through 1787 to 1788 and even into 1789 and 1790.

Graham Moore (admiral): Admiral Sir Graham Moore, {'1': ", '2': ", '3': ", '4': "} (1764–1843) was a Royal Navy officer.  As a junior officer he took part in the Great Siege of Gibraltar during the American Revolutionary War.  As captain of the frigate "Melampus" , he took part in the Battle of Tory Island in October 1798, capturing the French frigate "Résolue" two days later, during the French Revolutionary Wars.  He went on to be First Naval Lord, then Commander-in-Chief, Mediterranean Fleet and, finally, Commander-in-Chief, Plymouth.  He was the younger brother of General Sir John Moore.

Overmountain Men: The Overmountain Men were American frontiersmen from west of the Appalachian Mountains who took part in the American Revolutionary War.  While they were present at multiple engagements in the war's southern campaign, they are best known for their role in the American victory at the Battle of Kings Mountain in 1780.  The term "overmountain" refers to the fact that their settlements were west of, or "over", the Appalachians —the range being the primary geographical boundary dividing the 13 American colonies from the western frontier.  The Overmountain Men hailed from parts of Virginia, North Carolina, and what is now Tennessee and Kentucky.

Indian barrier state: The Indian barrier state or buffer state was a British proposal to establish a Native American state in the portion of the Great Lakes region of North America west of the Appalachian Mountains, and bounded by the Ohio and Mississippi rivers and the Great Lakes.  The concept of establishing such a state, first conceived in the late 1750s, was part of a long-term plan to reconcile the Indian tribes to British rule and diminish hostilities between the tribes and the British Army following its victory in the French and Indian War.  After the region was assigned to the United States in the 1783 treaty ending the American Revolutionary War, British officials pursued efforts to organize the various tribes within it into a sort of Confederation that would form the basis of an Indian state, independent of the United States and under their tutelage, as a way to protect their fur trade ventures in the region and to block anticipated American attacks upon their remaining North American possessions.

Western theater of the American Revolutionary War: The Western theater of the American Revolutionary War (1775–1783) was the area of conflict west of the Appalachian Mountains, the region which became the Northwest Territory of the United States as well as the states of Kentucky, Tennessee, and Missouri.  The western war was fought primarily between American Indians with their British allies in Detroit, and American settlers south and east of the Ohio River.

Stefan Osmokruhović: Stefan Osmokruhović (German: "Stefan Osmokruch" , ; 1665–died in 1666) was the great judge (de.  "Grossrichter", sr. "veliki sudac") of the Križevci captainate, who in 1665 led a revolt of the Grenz infantry soldiers in the Varaždin generalate of the Military Frontier against the Austrian officers, after the rights of the frontiersmen had been compromised.  A Serb, Osmokruhović held secret meetings in the Slavonian Military Frontier, in which many Serbs took part in.  He was also supported by the judges of Koprivnica and Ivanica, Ilija Romanović and Nikola Vuković, and they all sent letters to the Austrian Leopold I, Holy Roman Emperor about the issues in March 1666.  Appointed the commander of the Varaždin frontiersmen themselves and named great judge ("Veliki Sudac"), he claimed to answer to no one besides the Austrian Emperor, and sought that the frontiersmen's right to ownership of the land between the Sava and Drava be recognized, among other issues.  Austrian lieutenant general Fra Johann Josef Herberstein (1639-1689) went to Križevci and demanded that his candidate be accepted as great judge, but the candidate was murdered by the frontiersmen.  The revolt was finally suppressed in 1666 by Herberstein, and Osmokruhović was sentenced to death.

Indian Reserve (1763): The Indian Reserve is a historical term for the largely uncolonized area in North America acquired by Great Britain from France through the Treaty of Paris (1763) at the end of the Seven Years' War (known as the French and Indian War in the North American theatre), and set aside in the Royal Proclamation of 1763 for use by American Indians, who already inhabited it.  The British government had contemplated establishing an Indian barrier state in the portion of the reserve west of the Appalachian Mountains, and bounded by the Ohio and Mississippi rivers and the Great Lakes.  British officials aspired to establish such a state even after the region was assigned to the United States in the Treaty of Paris (1783) ending the American Revolutionary War, but abandoned their efforts in 1814 after losing military control of the region during the War of 1812.

Charles Dashwood (Royal Navy officer): Vice-Admiral Sir Charles Dashwood KCB (1 September 1765  – 21 September 1847) was a distinguished British officer, who served in the Royal Navy during the American Revolutionary War, the French Revolutionary Wars, the Napoleonic Wars and the War of 1812.  He had a long and prestigious naval career, gaining his own command by the last stages of the French Revolutionary Wars.  He took part in a number of famous naval battles during his career, such as the Battle of the Saintes, the Glorious First of June and the Battle of Tory Island, where he received the sword of the French commodore, Jean Bompart.  His record also includes extensive operations in the West Indies and the Baltic Sea, followed by the expedition to New Orleans in 1815.

French frigate Surveillante (1778): Surveillante was an "Iphigénie"-class 32-gun frigate of the French Navy.  She took part in the Naval operations in the American Revolutionary War, where she became famous for her battle with HMS "Quebec"; in 1783, she brought the news that the war was over to America.  She later took part in the French Revolutionary Wars, and was eventually scuttled during the Expédition d'Irlande after sustaining severe damage in a storm.  The wreck was found in 1979 and is now a memorial.

Joseph Hardin, Sr.: Colonel Joseph Hardin, Sr. (April 18, 1734 – July 4, 1801) Hardin was an Assemblyman (Provincial Congressman) for the North Carolina Colony.  During the War for Independence, as a member of the militia from Tryon County, Hardin fought the Cherokee allies of Britain along the western frontier and was a signatory of the Tryon Resolves.  Later in the war, having taken his family over the Appalachian Mountains to the Washington District for safety against the advance of the Red Coats out of South Carolina, Hardin joined the Overmountain Men.  He saw action at the Battle of Ramsour's Mill and the decisive Battle of Kings Mountain.  Following the peace with Britain, Hardin was a co-founder and second Speaker of the House for the State of Franklin; and an Assemblyman in the Southwest Territory before its statehood as Tennessee.

Supporting paragraphs: Joseph Hardin, Sr. Overmountain Men
Answer: Overmountain Men