Official U.S. 12th Army position map at 2400 on D-Day (June 6, 1944).
U.S. Twelfth Army Group
Library of Congress CALL NUMBER G5701.S7 svar .A4<a rel="nofollow" class="external autonumber" href="http://hdl.loc.gov/loc.gmd/g5701sm.gct00021">[1]</a>