If you like making HST's you're going to have a lot of fun making the Tent of Armageddon Quilt Block, as it's basically a 5x5 grid of half square triangles.  I suppose that ladies before our time must have thought these resembled tents of soldiers preparing for combat.  A similar block that is a 6x6 grid of HST's rotated 90 degrees goes by the name "Battleground."