What is the correct spelling of Cornall in army?

There is no official term or spelling of "Cornall" in the military. It's possible you're thinking of a different term or a misspelling.

Could you please clarify what you're referring to? For example:

* Are you asking about a specific military unit or position?

* Is it a name of a person?

* Is it related to a specific military operation or program?

Providing more context will help me understand your question and give you a more accurate answer.