Complex sentence: Following draft-requirement fulfillment, Deibert was in the Marine Reserves, and then accepted an invitation from colleagues to attend the Oregon Army National Guard Drill (Hood River, OR) for service with Company D-162 Engineer Battalion, 41st Infantry Division.
Split into simpler sentences: Following draft-requirement fulfillment, Deibert was in the Marine Reserves. He then accepted an invitation to attend the Oregon Army National Guard Drill (Hood River, OR) for service with Company D-162 Engineer Battalion, 41st Infantry Division.