Watch 228,000 Flags Planted By Soldiers For Soldiers In Preparation For Memorial Day In 1 Minute At Arlington National Cemetery, each year in preparation of Memorial Day, the 3rd U.S. Infantry Regiment, the distinguished Old Guard, honors our countrys fallen soldiers by planting more than 228,000 American flags at every grave marker. This tradition has taken place annually since 1948. The Flags-In ceremony represents when both Confederate and Union soldiers decorated the graves of their fallen comrades after the Civil War. Over 1,000 soldiers participated ceremony, and every grave had a flag-in in a matter of hours. Do you support, and honor our troops on this weekend of memorial? 