First enacted to honor Union soldiers of the MISC@1 -LRB- it is celebrated near the day of reunification after the MISC@2 -RRB- , it was expanded after MISC@3 I to include MISC@4 casualties of any war or military action .

The holiday honors troops who have died in past wars like MISC@5 Memorial Day was first held in NUMBER@1 after the MISC@1 .
