**Veterans Only**: This study is about finding the best ways to manage chronic low back pain (cLBP) without surgery or drugs. Chronic means it's been present for a long time, and low back pain is pain in the lower part of your back. The study has two steps. In the first, veterans will either keep getting regular care, use an online tool for managing pain called Pain EASE, or do special physical therapy that includes Pain EASE and exercises. If pain isn't much better, or if more treatment is wanted, the second step offers yoga, spinal manipulation therapy (SMT), or cognitive behavioral therapy (CBT). SMT involves adjusting your spine, and CBT is a type of talk therapy. The study lasts one year, with 2529 participants across 20 centers. It's designed to see which treatments help the most with pain interference, which is how much pain affects daily activities.

• Participants will need to be available for in-person sessions and have internet access.
• Participants will be monitored for one year to see how effective the treatments are over time.
• The study focuses on non-drug, non-surgery options, which are generally low risk.