0321 USMC: Definition & Becoming a Reconnaissance Marine Are you interested in becoming a Reconnaissance Marine? If so, you’ve come to the right place. In this article, we will discuss what it means to be a 0321 USMC (United States Marine Corps) and the steps you need to take to become one. Let’s dive in! What is a 0321 USMC? A 0321 USMC, also known as a Reconnaissance Marine, is a highly skilled and specialized member of the United States Marine Corps. Reconnaissance Marines are responsible for gathering intelligence, conducting surveillance, and performing other high-risk missions behind enemy lines. They are trained to operate in small teams and are often…