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In summer 1757 the French invaded Hanover and defeated George II's son William Duke of Cumberland, leading the Anglo-Hanoverian army, at the Battle of Hastenbeck and drove him and his army into remote Bremen-Verden, where in the former monastery of Zeven he had to capitulate on 18 September (Convention of Kloster-Zeven).
During the Texas Revolution of 1835-1836, the majority of his troops were reassigned to General Zachary Taylor's "Army of Observation" at Fort Jessup, Louisiana, but Arbuckle managed to maintain order even as the pace of Indian removal accelerated.
On April 22, 1775, following the Battles of Lexington and Concord in Massachusetts, the Rhode Island General Assembly created a 1,500 man "Army of Observation" under the command of Brigadier General Nathanael Greene and sent them to Boston to serve in the new Continental Army under General George Washington.