I want to know the answer to the following question:
What conflict overseen by President Polk might be the source of Tennessee's nickname?
All the background I'm provided with is that "This explanation is more likely, because President Polk's call for 2,600 nationwide volunteers at the beginning of the Mexican-American War resulted in 30,000 volunteers from Tennessee alone, largely in response to the death of Davy Crockett and appeals by former Tennessee Governor and now Texas politician, Sam Houston.". Is that enough to answer the question?
Answer: no