同どう盟めい条じょう約やく

noun

treaty of alliance

A formal agreement between nations to cooperate and support each other, often militarily.

• 両りょう国こくは同どう盟めい条じょう約やくを結むすんだ。

  The two countries concluded a treaty of alliance.

• 同どう盟めい条じょう約やくに基もとづいて、支し援えんが行おこなわれた。

  Support was provided based on the treaty of alliance.