The United States Marine Corps is busy defending our country so please leave a message. If you are interested in joining the Marines please visit your local recruiter. One of the things I miss most about my time in the Marines is the sense of humor of my fellow Marines. Shared misery brings out the best humor in people and it’s a great way to get through tough situations. Happy Birthday to the United States Marine Corps! Semper Fi. If you enjoyed this be sure to watch the 2018 Marine Corps Birthday Message Video.