Diplomacy usually begins with bargaining, through direct or indirect communication, in an attempt to reach agreement on an issue. This bargaining may be conducted tacitly among the parties, each of which recognizes that a move in one direction leads to a response by the other that is strategic. The bargaining may be conducted openly in formal negotiations, where one side offers a formal proposal and the other responds in kind; this is generally repeated many times until a compromise is reached. In either case, reciprocity usually occurs, wherein each side responds to the other's moves in kind.