Now available: The United States Army in the World War, 1917-1919 Published in 1948, this 17 volume set contains key documents, maps, and records for the American Expeditionary Forces (AEF) from the start of the American involvement in World War I through the to the armistice. See volume 10 for the peace agreements.
Congressional record for 1917 has the debates on how the US entered the war.
The UK National Archives has released an eBook Armistice and legacy. This was an arts project – 9 students worked with artist Carol Adlam, Senior Lecturer in Illustration at Nottingham Trent University to interpret original sources using graphic art techniques.
British Library’s First World War website also provides free access to over 500 items from the collections including maps, letters and manuscripts. There is also a theme of memory which has articles from academic staff and a section of lesson curriculum materials for teachers.