In September 1918 , he planned .
In September 1918 , he led nearly 1,500 British , French , and Italian aircraft in the air phase of the Battle of Saint - Mihiel , one of the first coordinated air - ground offensives in history .
In September 1918 , he planned and led nearly 1,500 British , French , and Italian aircraft in the air phase of the Battle of Saint - Mihiel , one of the first coordinated air - ground offensives in history .