Washington successfully kept the army intact through the devastating winter, and gave the order at Valley Forge, April 12, 1778:
“The Honorable Congress having thought proper to recommend to the United States of America to set apart Wednesday, the 22nd inst., to be observed as a day of Fasting, Humiliation and Prayer,
that at one time, and with one voice, the righteous dispensations of Providence may be acknowledged, and His goodness and mercy towards our arms supplicated and implored:
The General directs that the day shall be most religiously observed in the Army; that no work shall be done thereon, and that the several chaplains do prepare discourses.”