Task: Analyze the tweet's emotional connotations and classify it as either 'neutral or no emotion' or as one or more of the specified emotions (anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust) that best portray the tweeter's mental state.
Tweet: A 'non-permissive environment' is also called a 'battleground' - #MilSpeak #hilarious
This tweet contains emotions: 
joy