Here are some possibilities to consider:
* The "Doctrine of Enlargement" might be a less common term for a concept related to expansionism or imperialism. This could refer to the belief that a country should expand its territory, influence, or power. However, it's not a recognized term in this context.
* You might be thinking of a specific historical event or policy. Perhaps you're referring to a particular instance where a nation expanded its territory or influence. If so, providing more context about the time period or location would be helpful.
* There might be a misunderstanding or misinterpretation. It's possible that the term you're looking for is something else entirely.
To help clarify the question, please provide:
* More context: What are you trying to understand about the "Doctrine of Enlargement"?
* Any specific historical or political figures or events you have in mind: This can help narrow down the possibilities.
Once you provide more information, I can offer a more accurate and helpful response.