The term "anti-imperialist international brigade" refers to a group of people who come together to oppose imperialism, which is when a powerful country controls or dominates weaker countries. This phrase can be broken down into simpler parts:
In more advanced discussions, you might encounter this term in the context of historical events, social movements, or political theories about how countries interact with each other.
While this term specifically refers to groups opposing imperialism, in a broader sense, "brigade" can refer to any organized group working towards a common goal, not just in a military context.
There are no specific idioms or phrasal verbs that directly relate to "anti-imperialist international brigade," but you might hear phrases like "join the fight" or "stand against" when discussing efforts against imperialism.
The definition provided in your suggestion seems to focus on a specific historical terrorist group, the Japanese Red Army, which was indeed involved in violent actions and had connections with other groups. However, the term "anti-imperialist international brigade" can be used more broadly to refer to any group fighting against imperialism, not just those engaging in terrorism.