(Definition of harp on (about sth) from the Cambridge Advanced Learners Dictionary & Thesaurus Â© Cambridge University Press).
Battle of Saratoga. In late September and during the first week of October 1777, Gate's American army was positioned between Burgoyne's army and Albany. On October 7, Burgoyne took the offensive. The troops crashed together south of the town of Saratoga, and Burgoyne's army was broken. In mop-up operations 86 percent of Burgoyne's command was captured.
The Battle of Concord, Massachusetts. The Battle of Concord, in Massachusetts, marks the start of the Revolutionary War. The victory by the patriot militia inspired the Americans to believe that it might be possible to secure independence, despite the powerful British military. The battle took place on April 19, 1775. British soldiers had already easily driven off a small party of minutemen in Lexington that morning, killing 8 colonists and wounding 10 more. The minutemen had gathered in Lexington after Paul Revere's midnight ride had warned them that the British are coming..