The most desperate struggle occurred on Longstreet’s front, where two Union regiments at separated points of this combat zone, the 20th Maine and the 1st Minnesota, achieved lasting fame by throwing back Confederate attacks that came dangerously close to breakthroughs. Rising above the surrounding countryside, the two Round Tops dominated the south end of Cemetery Ridge. If the rebels had gotten artillery up there, they could have enfiladed the Union left. Sickles’s advance had uncovered these hills. A brigade of Alabamians advanced to seize Little Round Top. Minutes earlier nothing but a
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