This weekend C-SPAN3’s American History TV does not give us much WWI to view. The only program has been shown the last two weekends–American Artifacts World War I, with National World War I Museum and Memorial Curator of Education Lora Vogt discussing artifacts in the collections.
It airs Sunday morning the 21st at 10:25 a.m. Central.
There are some stretches that are simply identified as American History TV but does not identify the nature of the programming. You may wish to check this programming to see what actually airs.