Complex sentence: Upon this redesignation the missile maintenance mission was transferred to Letterkenny Army Depot in Pennsylvania, and responsibility for the Activity was shifted from Army Ordinance, to Tooele Army Depot in Utah.
Split into simpler sentences: Upon this redesignation the missile maintenance mission was transferred to Letterkenny Army Depot in Pennsylvania. Meanwhile responsibility for the Activity was shifted from Army Ordinance, to Tooele Army Depot in Utah.