This is the fourth stanza from Laurence Binyon's poem For the Fallen. Referred to as the Ode of Remembrance, it was first published in The Times of London in September 1914 and has been incorporated into the ritual of remembrance in many countries.
You can find more information about The Ode of Remembrance on the dedicated web page of the Ministry for Culture and Heritage Te Manatū Taonga (MCH). MCH is the public-service department of the New Zealand government. To visit CLICK HERE: https://mch.govt.nz/ode-remembrance
For the full version of ‘For the Fallen’, all seven stanza’s, plus more information CLICK HERE:
http://www.greatwar.co.uk/poems/laurence-binyon-for-the-fallen.htm