The Battle of Celaya commenced which would see Constitutionalist under Álvaro Obregón repelled Pancho Villa's attack at Celaya.
It was a large-scale battle, with 15,000 Constitutionalist contesting 22,000 Villistas. Obregón had arrived early to prepare defensive positions over which Villa would attempt blind cavalry charges to his defeat.
A French attempt to take German defense positions on the lower slopes of the Hartmannswillerkopf failed.
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