At the time, Syria and Palestinian fedayeen called for a rematch of the 1948 Arab-Israeli War, but other Arab states (most notably Egypt under Gamal Abdel Nasser) felt it was not the right moment to strike. Instead, they agreed on the non-military belligerent tactic of diverting water from the Jordan River so that Israel could not use it. This diversion was called the 1964 Headwater Diversion Plan. It went against the original agreed proposals of the River Jordan by both Israel and the Arabs in the 1955 Unified Johnston Plan, also known as the Jordan Valley Unified Water Plan. This was one of the factors that later precipitated the Six-Day War in 1967.