In February 2005, Defense Minister Shaul Mofaz decided not to extend Ya'alon's service as chief of staff for another year. This marked the climax of tensions between Mofaz and Ya'alon, which had arisen partly through Ya'alon's objection to the Gaza disengagement plan. On 1 June 2005, Ya'alon retired from the army, and Dan Halutz, his successor as chief of staff, oversaw the disengagement.