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GETTYSBURG, Penn. — Monday marks the 150th anniversary of the beginning of the three-day battle of Gettysburg, fought July 1 -3, 1863.

Observances took place all weekend in the small Pennslyvania town that’s expected to draw between 200,000 to 300,000 people during this week.

Civil War historians consider the battle of Gettysburg a turning point in the war.  The point reached by Gen. Robert E. Lee’s Army of Northern Virginia during the assault known as Pickett’s Charge on July 3 is known as the “High Water Mark of the Confederacy.

Between 7,000 to 8,000 soldiers died during the three-day battle.  There were 51,112 casualties ( 23,049 Union and 28,062 Confederate) — that includes dead, wounded and missing.