Your eligibility for VA disability hinges on proving your claimed conditions were incurred or aggravated during **a period of "active service" or "inactive duty training"** as defined by law, which for National Guard members specifically includes Title 10 federal active duty (e.g., deployments) or Title 32 full-time National Guard duty under federal control, but typically excludes routine monthly drills and annual training unless an injury occurred **in the Line of Duty (LOD)**. The foundational principle is **service connection** under **38 CFR 3.303**, requiring a current diagnosis, an in-service event, and a medical nexus linking the two. For mental health conditions like PTSD, direct service connection requires a confirmed **stressor** occurring during qualifying service, with ratings assigned under **38 CFR 4.130**, Diagnostic Code 9400. Critically, the VA often denies claims for conditions from weekend drills due to lack of an official LOD investigation; you must obtain and submit a **DA Form 2173 (Statement of Medical Examination and Duty Status)** to document any injuries from training. The precedent set by *Buchanan v. Nicholson* reinforces that the VA must consider all evidence of record, including lay statements, to corroborate an in-service event. Your actionable next steps are: 1) Secure all LOD determinations for any injuries/illnesses; 2) Gather all military medical records (even from drill weekends) and civilian treatment records; 3) Obtain clear, current medical diagnoses; and 4) Submit a fully developed claim (FDC) via **VA Form 21-526EZ** with detailed buddy statements and a **nexus letter** from a medical professional, preferably citing the specific in-service event and LOD documentation. **Disclaimer: This information is for educational purposes based on general VA policy and is not legal, medical, or official claims advice; for personalized guidance, consult an accredited VA attorney or claims agent.**
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