In the 13th card of the Snow White series, the dwarfs want to please Snow White and wash up outside, all except for Grumpy.
“Dearest Tim, yesterday we saw some men who looked as funny as the dwarfs. They were all dressed up to celebrate the liberation of Ghent by the allied soldiers one year ago. Love, Dad”
Ghent, in Belgium, was occupied by Germany in World War I in addition to World War II. The British liberated Ghent early in September of 1944.
Below is a brief video showing the liberation of Ghent from Youtube.