Rolls-Royce has won contracts worth a total of $224m with the US Department of Defense to support US military branches and global air forces.The FTSE 100 company will provide logistics support, engineering, parts, repairs, field services and design modifications across a variety of fleets.Executive vice president of services Paul Craig said: "We continue to grow our services business as we focus on meeting our customers' needs and keeping their aircraft mission ready."Our wide portfolio of service offerings means customers can select the best fit for their fleet, everything from parts and repairs to logistics and engineering support."