Which preposition to use with teamwork

against Occurrences 1%

This offensive proved that the Allies had not been shaken from their determination to bide their time until they were thoroughly prepared and ready for the attack, and were able to co-ordinate their efforts in genuine teamwork against the powerful and strongly-entrenched enemy in the west, while the Russian offensive on the eastern front was also in progress.

Which preposition to use with  teamwork