<Tr> <Td> John J. Pershing Henri Gouraud Henri Berthelot </Td> <Td> Wilhelm of Prussia Max von Gallwitz Albrecht, Duke of Württemberg </Td> </Tr> <Tr> <Th_colspan="2"> Units involved </Th> </Tr> <Tr> <Td> <P> American Expeditionary Forces </P> <Ul> <Li> First Army </Li> <Li> Second Army </Li> </Ul> Fourth Army Fifth Army Siamese Expeditionary Forces </Td> <Td> Army Group German Crown Prince Army Group Gallwitz Army Group Duke Albrecht </Td> </Tr> <P> American Expeditionary Forces </P>

What was the purpose of the battle of argonne forest