Lockheed, GD Win U.S. Army Contract  WASHINGTON (Reuters) - The U.S. Army on Tuesday awarded  General Dynamics Corp. &lt;A HREF="http://www.investor.reuters.com/FullQuote.aspx?ticker=GD.N target=/stocks/quickinfo/fullquote"&gt;GD.N&lt;/A&gt; the lead role in developing a new  warfighter communications system, with Lockheed Martin Corp.  &lt;A HREF="http://www.investor.reuters.com/FullQuote.aspx?ticker=LMT.N. target=/stocks/quickinfo/fullquote"&gt;LMT.N.&lt;/A&gt; to get an equal share of the work, which GD said was  worth \$7 billion through 2018.