7th Engineer Battalion ( United States ) The 7th Engineer Battalion is a unit of the United States Army located at Fort Drum , New York . This battalion falls under the 10th Mountain Division ' s 10th Sustainment Brigade . Lineage . Organized 31 December 1861 in the Regular Army at Washington , D . C . , from new and existing companies of engineers as a provisional engineer battalion ( constituted 28 July 1866 as the Battalion of Engineers ) A Silver color metal and enamel device 1 inch ( 2 . 54 cm ) in height overall blazoned : Sable , an anchor debruised by two oars saltirewise between in fess two increscents all Argent ; on a chief of the last embattled a cross Gules . Black and white were the old colors of the Engineer Corps . The anchor and oars device was the badge of the Engineers and Pontoniers of the Army of the Potomac where the old units of the regiment did such gallant service . The crescents are the device of General Winfield Scott and represent the service of the old company in 1846 - 1848 in the Mexican War . In France , the regiment served with great gallantry in the 5th Division . The crossing of the Meuse near Dun is indicated by the device in chief of the shield which is not only a cross for the crossing of the river but the device of the lords of Dun . The distinctive unit insignia was originally approved for the 7th Engineer Regiment on 27 August 1926 . It was redesignated for the 7th Engineer Battalion on 7 March 1940 . It was redesignated for the 7th Engineer Combat Battalion on 13 May 1940 . The insignia was redesignated for the 7th Engineer Battalion on 6 July 1954 . Sable , an anchor debruised by two oars saltirewise between in fess two increscents all Argent ; on a chief of the last embattled a cross Gules . On a wreath of the colors Argent and Sable a fusil Gules on a bridge bent Argent . Coat Of Arms . Blazon . Motto SEVEN TIMES TESTED BY FIRE . Black and white were the old colors of the Engineer Corps . The anchor and oars device was the badge of the Engineers and Pontoniers of the Army of the Potomac where the old units of the regiment did such gallant service . The crescents are the device of General Winfield Scott and represent the service of the old company in 1846 - 1848 in the Mexican War . In France , the regiment served with great gallantry in the 5th Division . The crossing of the Meuse near Dun is indicated by the device in chief of the shield which is not only a cross for the crossing of the river but the device of the lords of Dun . The crest well symbolizes the work of the regiment in the 5th Division . In the very rough work of November 2 to 6 , 1918 , the regiment was called upon to prove itself seven distinct times . The motto is a recollection of this . The coat of arms was originally approved for the 7th Engineer Regiment on 8 April 1922 . It was redesignated for the 7th Engineer Battalion and amended to update the history on 7 March 1940 . It was redesignated for the 7th Engineer Combat Battalion on 13 May 1953 . The insignia was redesignated for the 7th Engineer Battalion on 6 July 1954 . Campaign Participation Credit . Civil War War with Spain World War I World War II Vietnam Decorations . None