This work shows the ability of a readily-available oxidizer to achieve the selective oxidation of 3,5-diamino-1,2,4-triazole (DAT) to 3-amino-5-nitro-1,2,4-triazole (ANTA) in high yields. This strategy reduces the synthesis of this important energetic material and synthon down to a single step. Analysis was conducted on the product and confirmed that the product was indeed ANTA. The yield, safety, and economics of this process are all superior to the current state-of-the-art two-step multi-pot procedure.