Buçaco in Wellington's campaign of delay and withdrawal

Wellington's purpose at Buçaco was to gain time before falling back on the Lines of Torres Vedras. A Portuguese corps reaching a crossroads in time could have blocked Masséna and forced another battle, delaying the French further. That opportunity did not change the underlying plan: withdrawal remained the intended course unless an extraordinary victory destroyed Masséna's army. The defensive campaign aimed to strain French logistics until they broke. Orderly disengagement mattered because many of the losses that made French victories overwhelming came during the defeated army's withdrawal. Keeping an army together under those conditions required skill and some luck. Washington's repeated preservation of the Continental Army provides another example of recognizing when to pull out and retaining a force.