The term 'Last Post' is a military tradition that dates back to the 18th century. It is a ceremony that is held at the end of the day to honor fallen soldiers and pay respect to those who have served in the military. The term is also used to refer to the final bugle call of the day, which is known as 'Taps'. Taps is a four-letter word that is used to signify the end of the day and the beginning of the night.