<Tr> <Td> </Td> <Td> This section needs additional citations for verification . Please help improve this article by adding citations to reliable sources . Unsourced material may be challenged and removed . (November 2015) (Learn how and when to remove this template message) </Td> </Tr> <P> The "First Post" call signals the start of the duty officer's inspection of a British Army camp's sentry posts, sounding a call at each one . The "Last Post" call originally signalled merely that the final sentry post had been inspected, and the camp was secure for the night . In addition to its normal garrison use, the Last Post call had another function at the close of a day of battle . It signalled to those who were still out and wounded or separated that the fighting was done, and to follow the sound of the call to find safety and rest . </P> <P> Its use in Remembrance Day ceremonies in Commonwealth nations has two generally unexpressed purposes: the first is an implied summoning of the spirits of the Fallen to the cenotaph, the second is to symbolically end the day, so that the period of silence before the Rouse is blown becomes in effect a ritualised night vigil . The Last Post as played at the end of inspection typically lasted for about 45 seconds; when played ceremonially with notes held for longer, pauses extended, and the expression mournful, typical duration could be 75 seconds or more . </P> <P> This custom dates from the 17th century or earlier . It originated with British troops stationed in the Netherlands, where it drew on an older Dutch custom, called taptoe, from which comes the term Tattoo as in Military tattoo . The taptoe was also used to signal the end of the day, but originated from a signal that beer taps had to be shut, hence that the day had ended . It comes from the Dutch phrase Doe den tap toe, meaning "Close the tap". The Dutch bugle call Taptoesignaal, now used for remembrance events, is not the same tune as the Last Post . </P>

When was the last post played in ww1