Arlington National Cemetery's 150th-- Part 2: Eight Things You Might Not Have Known

3.  It hosted the first national Memorial Day (called Decoration Day back then) in 1868.

4.  It is the only national cemetery with servicemen buried there from every war the U.S. fought.  The first military burial wasn't until 1864, but in 1892 Revolutionary War dead were reinterred from a Georgetown cemetery.  War of 1812 veterans were also reburied there.

--Brock-Perry