No, not to join AFROTC. You will sign a contract at some point during your AFROTC career, which will obligate you to spend four years as an active duty Air Force or Space Force officer. If you are a high school scholarship winner, you will have the first year of AFROTC to try it out and decide if it's something that you want to continue to do. You can leave the AFROTC program (and end your scholarship benefits) any time during the first year of the program. If you leave before the start of your second year, you will not owe the service anything. If you are not a high school scholarship winner, you have the first two years of your AFROTC career to decide if the Air Force/Space Force is a path you'd like to pursue for a career. If, during your first two years in the program, you decide not to continue with AFROTC you can leave with no obligation to the service. However, once you return from Field Training and begin your third year in the program, you will sign a contract that obligates you to spend four years as an active duty Air Force or Space Force officer. If you receive an in-college scholarship, you will sign a contract that obligates you to a four year active duty commitment when you accept the scholarship.