World War 1 is often characterized as a trench was, because most of the fighting took place in trenches and other fortified positions.
valwriting.com
The First World War - July 28, 1914 – November 11, 1918.
non-interventionism
The Western Front was characterized by trenches that ran from the Switzerland border with France to the North Sea. The front did not change much during the course of the war.
Literature after World War I is often characterized by themes of disillusionment, fragmentation, and a sense of loss, reflecting the trauma and devastation of the war. Modernist literature emerged as a response to the changing world, experimenting with new narrative techniques and perspectives. Before World War I, literature tended to be more traditional in form and focused on themes of patriotism, heroism, and romanticism.
very often
Throughout the war there was every kind of warfare you could imagine - and lots you couldn't.
World War 1 is often also called the Great War. Of course, when it got this name, no one was predicting World War 2.
The war to end all wars
Most of World War 1 was characterized by stalemates caused by trench warfare. This caused the war to drag out for longer than expected, and casualties extended to the civilian populations of some countries.
Germans wer often called "Huns" by their enemies in World War I
World War I started in 1914. It is often referred to as the "Great War". World War II started in 1945.