The United States Army is the largest and oldest established branch of the U.S. military responsible for land-based military operations. The primary mission of the Army is to "provide necessary forces and capabilities ... in support of the National Security and Defense Strategies.
Background: The traditional seal used during and since the Revolution was redesignated as the Seal of the Department of the Army by the National Security Act of 1947. The Department of the Army seal is authorized by Section 3011, Title 10, United States Code.
Update [July 19th, 2011]: The United States Army Seal story didn't end here. Almost a year after my first edition of the design, I was flexing muscles of my Adobe Photoshop CS5, and managed to come with a new "bronze" edition of the seal, which I am happy to present here, in the original post.
As always, the above insignia are available on a limited number of selected high quality products via my “Military Insignia” galleries exclusively from Zazzle.com. You can just follow the links in the article to get to the corresponding galleries.
I will also make my insignia designs available free of charge to any military units and personnel to be used for non-profit/non-commercial and charitable causes, benefiting troops and their families, as well as for non-commercial internal units’ duty-specific purposes, such as unit website design, training materials and presentations, as I have already done on a number of occasions.