Patriotic pitcher was an inspiration

Q: The pitcher in this photo caught my attention in a junk store in Dallas, Texas, many years ago, probably in the 1950s. It was in the present damaged condition when I bought it, and I'm sure it is worth little or no money at all. My interest is purely curiosity. Marked on the bottom is a globe with the word "Grimades." Above the mark are the words "Made By The Girls Of Staffordshire During The Winter of 1917/18 When The 'Boys' Were In The Trenches Fighting For Liberty & Civilization." Who