Here's why:
* Collective Nouns: These nouns refer to a group of things or people considered as a single unit (e.g., team, flock, committee).
* Battle of Lost War: This phrase refers to a specific event (a battle), and doesn't represent a group of individuals or objects. It's a proper noun, specifically a noun phrase that describes a specific battle.
Therefore, "Battle of Lost War" is not a collective noun.