Definition of "join forces" []

• Work together on a common enterprise of project (verb)

WordNet. Princeton University. 2010.

• "He requisitioned ships, sailed with the men to North Africa, and tried to join forces with the anti-Marian proconsul there, Quintus Caecilius Metellus Pius, but the two men quarreled."
• "Those who believe in the philosophy of A Mind at a Time can join forces to develop plans to create neurodevelopmentally attuned schools in their communities and cooperate with educators to find models that meet their educational standards and mesh with the cultural values of their communities."
• "They want to get Tree Line and Wind Lake to join forces with them against us."