An army of observation is a military body whose purpose is to monitor a given area
or enemy body in preparation for possible hostilities.
Some of the more notable armies of observation include:
*
Third Reserve Army of Observation, a Russian army tasked to monitor the Austrian border in 1811 prior to the
French invasion of Russia
*The army of observation at
Fort Jesup
Fort Jesup, also known as Fort Jesup State Historic Site or Fort Jesup or Fort Jesup State Monument, was built in 1822, west of Natchitoches, Louisiana, to protect the United States border with New Spain and to return order to the Neutral Strip. ...
, Louisiana, United States, which monitored Texas' transition from Spanish to Mexican control, and to eventual independence
*The
Hanoverian Army of Observation which monitored the border prior to the
French Invasion of Hanover in 1757
References
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Army units and formations