100th Anniversary: End of World War I - 1918-2018

The South Lancashire Regiment (formerly the Prince of Wales Volunteers) were formed in the Mid-1880's. The 40th Brigade of Foot (left) served in Egypt during WWI. These labels were produced in Paris and also come perforated and in at least one other colour.

Londonbus1.

Three stamps from the German Kamerun colony, overprinted C.E.F. (Cameroon Expeditionary Force) and one from Togo with a Anglo-French Occupation overprint. Numbers on the cards are the Michel catalog numbers.

A French philatelic souvenir issue for the infantrymen of the two Battles of the Marne, with French and American soldier uniforms featured.
 

French philatelic souvenir issue for the centenary of the Battle of the Somme:

French philatelic souvenir issue for the Chemin des Dames, another battle theater west of Verdun.

France semi-postal issues of 1915-17 for the war orphans and the Red Cross. These are the very first commemorative stamps of France. Also a recent reprint from the 2018 Paris stamp expo. The series was re-issued twice in the 1920's with two different sets of values, but I am only showing stamps from the original series here. 

Here is a joint Canada-France issue from last year...

A series of German stamps used in occupied Belgium:

Semi-postal issue from Bavaria for the war wounded:

A set of Austro-Hungrian military post issues for use in Romania:

Turkish stamp overprinted to the profit of the war orphans:

 

And, finally, a set of military post stamps from Austria-Hungary:

Below is an interesting piece of postal history from the U.S. during World War I.  In fact, I previously posted this on the Postmark Calendar back on the anniversary of the date in 2017, but it fits very nicely to the theme of this thread, so I will use it for double duty!

Read more: thestampforum.boards.net/thread/426/postmark-calendar?page=165#ixzz5WRAqI7h2

This example is U.S., Scott #406, 2-cent carmine, perf 12, type I, probably from a booklet pane, cancelled on 21-Aug-1916, in Columbus, Ohio. The sender was stationed at Camp Willis (U.S. Army), during World War I. You will notice that the stamp and postmark are on the side of the envelope with the sealing flap. That is because there is a black-and-white photo on the other side of the envelope, shown below the stamp and postmark.

Some online research indicates that Camp Willis operated from 1911-1920 in the Columbus, Ohio area:
digital-collections.columbuslibrary.org/cdm/ref/collection/memory/id/6092

A bit of added personal connection to this item:  the recipient of this letter was my maternal grandmother, who lived from 1899-1975, so she would have been 17 years old at the time and living in Cleveland, Ohio, and the sender was one of her cousins, who was in the U.S. Army at the time training to go to war.  I do not know what eventually happened to the cousin, if he went overseas or not.  I came into possession of this cover after my maternal grandfather passed away in the 1980s, and it was found in a box of old letters in the attic of my grandparents' house by my mother, who dutifully saved the philatelic items for me.  Thanks, Mom!