The horror of the Civil War was the graphic and powerful subject of the 1989 Academy Award-winning film Glory, screened at the Katharine Cornell Theatre on Monday night. The event kicked off the Civil War Film Series, jointly sponsored by the Martha’s Vineyard Film Society and the Martha’s Vineyard Museum to commemorate the country’s most deadly war through movies, talks and exhibitions. The museum recently launched an exhibit titled We Are Marching Along: Martha’s Vineyard and the Civil War which continues until April 2012.