'Weid' is a Scottish and Irish varient of 'weed' and eu in French means 'got' in Engish. This poem is an anti-Vietnam war poem that deals with burning the fields of that country into weeds with Napalm 'got' by U.S. military forces. Houedard may also be referring to 'field day,' that originally referred to a set of military exercises, a term utilized in 'A Scheme for Equipping and Maintaining Sixteen Men of War' (1747), e.g., These periodical intervals of eating and drinking...are to the Citizens as it were Field Days, for improving ...their Valour [internet]. -- Source of annotation: Marvin or Ruth Sackner.