U.S. Department of The Army Emblem. 
In the center is a Roman cuirass below a vertical unsheathed sword, point up, the pommel resting on the neck opening of the cuirass and a Phrygian cap supported on the sword point, all between on the right an esponton and on the left a musket with fixed bayonet crossed in saltire behind the cuirass and passing under the sword guard.
To the right of the cuirass and esponton is a flag of unidentified designs with cords and tassels, on a flagstaff with spearhead, above a cannon barrel, the muzzle end slanting upward behind the cuirass, in front of the drum, with two drumsticks and the fly end of the flag draped over the drumhead; below, but partly in front of the cannon barrel, is a pile of three cannon balls.
To the left of the cuirass and musket is a national color of the Revolutionary War period, with cords and tassels, on a flagstaff with spearhead, similarly arranged above a mortar on a carriage, the mortar facing inward and in front of the lower portion of the color and obscuring the lower part of it; below the mortar are two bomb shells placed side by side.
Centered above the Phrygian cap is a rattlesnake holding in its mouth a scroll inscribed "This We'll Defend."
Centered below the cuirass are the Roman numerals "MDCCLXXVIII."
For differences between this text description and the emblem shown above, see "Army Seal vs. Army Emblem", below.
US Army Institute of Heraldry
10 U.S.C. § 3011