combined effort

A combined effort seemed impossible, so that the three of us accepted the maxim of each man for himself.

This, when thus made a direct object of combined effort, often secures results most gratifying and encouraging.

The time was soon to arrive when a big combined effort could be made to pierce the German line.

He learned the advantages of cooperation and combined effort, and thus formed the first rudiments of society and social life.

Among the Mashonas each village is independent, so that a combined effort is still less to be feared.