攻守同盟

Explanation: Originally referred to the Covenant entered into between countries, joint offensive or defensive war with each other. Multi-fingered bad guys are contracting with each other, and acting in order to cover up crimes. 　　Usage: Partial official; as object; that collusion between the co-operation partner 　　Source: Qing Liang "private meeting Chinese Foreign Policy": "Japan's only English-Japanese alliance with the British end, and the Russo-Japanese campaign party intoxicated, but also Japan and South Korea and South Korea Results conspiracy of silence." 　　Examples: Warring States period, the six countries entered into a ~, United Kangqin.