It is your choice whether to apply during your final year of secondary school or during your obligatory service, but keep in mind that first-year students may enter Columbia only in September. You may prefer to apply to Columbia while you are still in secondary school and you have your counselors and teachers near at hand when you are arranging for transcripts, recommendations and other credentials to be submitted; if you are admitted, then we will grant a deferment of your entry to Columbia so that you may perform your mandatory service. On the other hand, you may wish to apply during your time of service in case it brings you additional self-awareness and life experiences that you feel may make your candidacy more compelling.
If you apply to Columbia during your final year of secondary school and are not admitted, then you may apply again during your obligatory service. That is permitted only if you are not holding a place at another college or university anywhere in the world.