01/06/1774 Border dispute between Pennsylvania & Virginia escalates.
01/06/1777 Pennsylvania's 8th Regiment leaves to join Washington in New Jersey
01/07/1787 Court held in Greensburg for the first time.
01/10/1887 Latrobe Electric Light Company incorporated. One of its founders was A.W. Mellon.
01/22/1895 Westmoreland Hospital Association founded.
01/28/1963 Devastating fire at St. Vincent College in Latrobe
01/30/1897 Building of the current Courthouse (Westmoreland's fifth) authorized by the Court.
01/31/1908 Current Courthouse dedicated.
02/02/1787 Arthur St. Clair elected President of Continental Congress.
02/07/1821 William Jack died. He was sheriff when Hanna's Town was attacked and one of three donors
of the courthouse property in Greensburg.
02/09/1799 Greensburg incorporated.
02/14/1789 Court House and Jail authorized
02/17/1941 110th Infantry Regiment called up for service in WW II.
02/20/1802 Christopher Truby, one of the founders of Greensburg, died.
02/26/1773 Westmoreland County created out of Bedford. Hanna's Town named to act as the first county seat.
02/26/1826 Pennsylvania Canal Act was sponsored by James Clark of Westmoreland County.
03/9/1910 Westmoreland County Coal Strike of 1910-1911 began.
03/10/1908 Congressman John H. Dent was born in Johnetta, PA.
03/10/1951 Diocese of Greensburg is erected
03/17/1936 The Great St. Patrick's Day Flood submerges the town of Livermore under 18 feet of water.
03/18/1845 Johnny Appleseed (born John Chapman in 1774) died. Westmoreland County cider mills were the
source of many of his seedlings.
03/28/1781 Washington County created from part of Westmoreland County.
03/30/1803 Indiana County was formed from part of Westmoreland County and Lycoming County.
04/02/1891 Morewood Massacre (of striking workers).
04/06/1773 First English Court west of the Allegheny Mountains was convened at Hanna's Town.
04/13/1915 The famous Rattlesnake flag was transferred from Greensburg to the State Library, at Harrisburg.
04/14/1912 Young Greensburg Woman Survives Titanic Disaster.
04/20/1852 Justice Richard Coulter dies in Greensburg.
05/8/1970 Westmoreland County Community College founded.
05/16/1775 Hanna's Town Resolves, a bold precursor to the Declaration of independence, is adopted.
05/21/1937 Eleanor Roosevelt visited Norvelt.
05/30/1925 G.A.R. dedicates veterans monument in Greensburg
06/3/1918 Seton HIll authorized to confer degrees.
06/06/1812 Greensburg Riflemen volunteered for service in War of 1812
06/15/1797 Laughlintown laid out by Robert Laughlin as “East Liberty.”
06/26/1972 "Old Hanna’s Town" listed as a National Historic Site. Today it is known as Historic Hanna's Town.
06/28/1902 Monessen Daily Independent first published.
06/29/1940 Pennsylvania Turnpike completed.
07/2-8/1755 Braddock’s Army passed through present-day Westmoreland County on its way to Fort Duquesne.
07/03/1754 George Washington capitulated at Fort Necessity.
07/5/1912 Collision on the Ligonier Valley Railroad near Ligonier, PA
07/13/1782 Hanna's Town attacked and burned by Indians & their British allies
07/15/1917 10th Infantry Regiment called up for World War I
07/15/1994 President Clinton speaks on Main Street in Greensburg.
07/26/1794 Pittsburgh-Philadelphia mail post rider was robbed near Greensburg by Whiskey Insurgents
07/29/1786 First newspaper west of the Alleghenies, the Pittsburgh Gazette, was printed.
08/02/1772 Earliest Church Records in County - Harrold's Zion Lutheran Church
08/03/1773 First lawyer, Francis Dade, is admitted to Westmoreland County Bar.
08/05/1763 Battle of Bushy Run
08/06/1763 Second day of the Battle of Bushy Run
08/07/1742 Nathanael Greene born. Greensburg was named for this Revolutionary War general.
08/07/1882 Seton Hill College founded
08/10/1786 Second Westmoreland County Courthouse completed
08/24/1781 Lochry's Defeat. Col. Archibald Lochry and his force of just over 100 men from Westmoreland County were defeated along the Ohio River by Native Americans. They were on their way to meet Gen. George Rogers Clark’s force to attack Fort Detroit in an effort to stop British-supported Indian raids. All Lochry’s men were either killed or captured.
08/31/1818 Arthur St. Clair died.
08/31/1952 Last run of the Ligonier Valley Rail Road
09/1/1932 First Sears store in Westmoreland County opens in downtown Greensburg.
09/02/1791 Thomas Hamilton named first postmaster of Greensburg
09/2/1958 Penn State opens the New Kensington Campus.
09/03/1794 Whiskey insurrectionists besiege Drum House in Greensburg.
09/03/1895 First professional football game in the world played at Latrobe.
09/11/1794 Eighty whiskey insurgents from Greensburg and Hempfield Township are granted amnesty.
09/18/1969 180 acres of Hanna's Town site is acquired by Westmoreland County.
09/19/1786 "Newton" renamed "Greensburg," in honor of General Nathanael Greene.
09/23/1789 Unity Township formed out of Mount Pleasant Township.
09/23/1812 Greensburg Rifle Company left to join William H. Harrison.
09/26/1783 Fayette County formed out of part of Westmoreland County.
09/24/1788 Allegheny County formed out of part of Westmoreland County.
09/26/1958 President Eisenhower seals the "Century Chain" at Fort Ligonier.
09/26/1968 Plans announced for new Chrysler plant near New Stanton.
10/01/1773 Westmoreland County's first election
10/3/1955 First combined issue of Tribune-Review
10/05/1932 President Hoover makes a campaign stop in Greensburg.
10/7/1918 Greensburg suffers its first death from the great flu epidemic.
10/09/1813 County-wide celebration and light-up night held for Perry's victory on Lake Erie.
10/9/1934 First running of Rolling Rock Steeplechase Races
10/12/1758 Fort Ligonier is successfully defended against an attack by a force of French & Indians from Fort
10/14/1891 Greensburg awards contract for first street lights.
10/24/1644 William Penn, founder of the Province of Pennsylvania, is born.
10/24/1846 St Vincent’s Archabbey and College began.
10/24/1854 Cornerstone for Westmoreland County's fourth courthouse was laid.
10/28/1934 WHJB is the first radio station to broadcast in Westmoreland County.
11/05/1768 Treaty of Fort Stanwix signed. Iroquois sell land west of the Allegheny Mountains to the Penn Proprietors. This “New Purchase” made settlement in future Westmoreland County legal for the first time.
11/12/1758 George Washington is nearly killed by friendly fire incident in future Westmoreland County.
11/20/1922 Boiler Firemen strike leaving the county courthouse and jail with no light or heat.
11/24/1950 Record-breaking snow fall occurs with 31 inches falling over Thanksgiving weekend.
11/29/1980 Walworth plant closed.
12/7/1949 Greensburg Coliseum destroyed by fire.
12/10/1785 Newtown, now Greensburg, was selected as the permanent county seat for Westmoreland County.
12/23/1823 "A Visit from St. Nicholas" published
12/23/1908 The Westmoreland County Historical Society was founded.