world war I US soldier

World War I, which ended 99 years ago on Saturday, took the lives of about 40 million people and is considered by many to be the first total, industrial war.

Although World War I did not deliver on its promise to be the “war to end all wars,” its conclusion on November 11, 1918, has been celebrated around the globe as Armistice Day. In the US, it is marked as Veterans Day

Here are 15 striking photos from the war to commemorate veterans in the US and around the world:

SEE ALSO: These amazing colorized photographs bring World War I to life

World War I officially began on July 28, 1914, after all the great powers of Europe formed two camps and issued declarations of war. Here, German soldiers leave Berlin for the Western Front on August 1, 1914, while women present them with flowers in gratitude.

This GIF shows how the war spread around the world.

Source: History Channel

Battlefield engagements were stop-and-go in World War I. Here, a British soldier was stitching his shirt only be interrupted by a German shell landing nearby during the British army’s advance toward Bapaume, France, sometime in 1918.

For the first time in history, grueling trench warfare became a defining characteristic of war. A US artilleryman uses some downtime in a trench in France to write home to his family on March 7, 1918.

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