What was the American Expeditionary Force's charge in 1916?

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Request for Question Clarification by omnivorous-ga on 10 May 2004 15:55 PDT

Delaplla --

The American Expeditionary Force didn't exist until Gen. John Pershing
was appointed to head them at the outset of World War I.
Library of Congress
"The American Expeditionary Forces"
http://memory.loc.gov/ammem/sgphtml/sashtml/aef.html

However, Pershing similar headed force into Mexico called the
"Punitive Expedition" in an attempt to capture Pancho Villa, who was
conducting cross-border raids at the time.  They failed to capture
Villa but it was the first use of heavier-than-air craft in the U.S.
Army in 1916:
http://www.sp.utexas.edu/jrn/cwp/pvg/punitive.html

Best regards,

Omnivorous-GA