How to file VA Type 2 diabetes claim (Agent Orange Vietnam presumptive since 1991)

5-step Schema.org HowTo for Type 2 diabetes — original Agent Orange presumptive (38 CFR 3.309(e), 1991). Vietnam exposure pathways: RVN boots-on-ground, Blue Water Navy (2019 Act), Korean DMZ, Thailand bases, Cambodia, Laos, C-123 aircraft. Rated 38 CFR 4.119 DC 7913 (10-100% by treatment tier). Foundation for 6-condition cascade: peripheral neuropathy, retinopathy, nephropathy/CKD, ED+SMC-K, foot ulcers, PAD. Treatment-tier tactical advice: metformin ≠ diet-only (correct rating 20%); restriction-of-activities documentation = 60%.