The letter they sent me stated that I violated the lease referring to a paragraph in my lease which states some things about being a nuisance.
"Nuisance" generally refers to things like throwing wild parties, sparking up a doob in the hallways, dealing drugs from your apartment, and generally making the other residents miserable with your antics.

You don't sound like you're up to those kinds of monkeyshines.

Can you please copy the paragraph in question here?