I was wondering whether waivers could be approved for Marine Corps OCS for experimental drug use several years ago. I have a 3.9 GPA as well as a Master's degree in engineering and a 300 PFT as well as team sports and Boy Scout experience. In addition I have a PPL as I would be going for an aviation contract. My test scores are near perfect as well. My only concern is that I have smoked marijuana occasionally until 2 years ago, and that 5 years ago I experimented with LSD 3 times in my freshman year of college. Can waivers be approved for this kind of drug use or is it pretty much a no-go for OCS? Are there differences between waiver likelihoods for different branches? If a waiver is rejected can you reapply for the same waiver with the same branch or with a different branch? I understand I made some stupid decisions when I was younger and I want to know what I can do now to put that behind me and serve my country. Thanks for any advice!