One of the things I've been enjoying during my vacation/sabbatical is the series, "The First World War."
It runs on the Military Channel (along with the BBC's "World at War"). I bought the DVD set and have thoroughly enjoyed it.
As a student of World War Two and Civil War history, I've never paid much attention to the "Great War." I should have. I am amazed that after the end of World War Two and the Cold War, the world today is pretty much in the shape it was on the eve of the First World War.
There was impending economic trouble, a rise in Islamic militarism (the last gasp of the Ottoman Empire), as well as militant European nationalism (as seen today in Eastern Europe, the Baltics, and in the racial tensions in nations such as France and Germany with immigrant populations).
The archival footage is simply amazing--especially the footage of the Armenian genocide, which the Turks contended was justified because the Christian Armenians were supposedly allied with Christian Russia. "Christian Russia." Boy does that sound odd . . . There are several scenes of American "canteens" run by volunteers, which made me think of Machen.
In any case, check it out. If not on the Military Channel, then here: The First World War