<a href="//commons.wikimedia.org/wiki/Armenian_volunteer_units" title="Armenian volunteer units">Armenian volunteer units</a> under British <a href="https://en.wikipedia.org/wiki/Egyptian_Expeditionary_Force" class="extiw" title="en:Egyptian Expeditionary Force">Egyptian Expeditionary Force</a>, under <a href="https://en.wikipedia.org/wiki/Edmund_Allenby,_1st_Viscount_Allenby" class="extiw" title="en:Edmund Allenby, 1st Viscount Allenby">Edmund Allenby</a>
Vartan Malcom, published in 1919 by Pilgrim Press, Boston
The image dates 1917-18, the <a href="//commons.wikimedia.org/wiki/Sinai_and_Palestine_Campaign" title="Sinai and Palestine Campaign">Sinai and Palestine Campaign</a>
"The Armenians in America" by Vartan Malcom