next on the civil war, historians and officials from the national park service commemorate the beginning of the overland campaign which took place in virginia 150 years ago in may and june of 1864. the ceremony includes keynote remarks by civil war scholar james robertson, who explains the strategy employed by union general ulysses s. grant against the confederates and how the campaign impacted the war as a whole. this event took place in spotsle vain yeah county, virginia, at fredricksburg and the national military park. it's just under an hour. >> as the armies of grant and lee marched in may of 1864natio. it's just under an hour. >> as the armies of grant and lee marched in may of 1864 the victory or defeat depended on their effortsfrom the new york herald april 13th, 1864. upon the campaign that we are about to engage there depends