On the night of April 18 1775 a force of 700 British soldiers left Boston in search supply of colonial weapons, where did the British think it was located

Concord

Explanation:

On the Eve of Battle of Lexington and Concord that was fought on 19th of April, 1775; the battle between the 13 American colonies and the British authorities, which have been building up for some years notably in Massachusetts, got intense on 18th of April, 1775, when the 700 British soldiers or army, move out from Boston to Concord, in the hope that, they will be able to a weapon cache, however, the militiamen of the American colonies were signalled, which led to a full blown battle, eventually, the British army, retreated after so much gun fire.

this doesn't support enough information to answer the question.

answer; they are called (pebbling);