United States Army Engineer Regimental Corps Crest Criteria: The Engineer Regimental Corps Crest is one of the Army's 14 Regimental Corps Crest insignias.The Regimental Corps Crest signifies each service member's unique regiment and is worn over the right breast pocket on the Class A uniform. The castle and the motto "ESSAYONS" traditionally have been associated with the Corps. Scarlet and white are the colors of the Corps of Engineers. The regimental insignia was approved for wear on April 11, 1986.