Status Updates From America's Deadliest Battle:...

German withdrawal to the Ourcq allowed the Allies to reopen the full length of the Paris-Chalons railway, an unfettered supply line to Eastern France. This opening proved especially important to the Americans who now had access to a full network from the Atlantic ports to their new operational bases near St. Michiel, Toul & Nancy.

Allies & War Department were convinced trench warfare would continue & send instructors overseas to teach digging. The dominance of the rifle seem to have been Pershing's input, coupled with a correlation between lack of Frejch artillery support & frontal attacks. Traffic & logistics remained bumpy, even while using separate ports (south of Loire) Lessons learned between Cantigny & Soissons remained unit-specific