Definitely claim as secondary, will need a DR statement connecting to knee. The hip of the same side is usually affected. This can also affect the spine(hip/spine syndrome) . Look into the Birmingham Hip Resurfacing (BHR) If you are a candidate
it is a great alternative to a THR. I had my right hip resurfaced 2 years ago when I was 47, still have some pain but nothing compared to not being able to walk.
I am 10% right knee, 20% right shoulder. Told my hip is not related. Let's see, I was a Navy/Marine Corps Parachutist, had hundreds of PLF's (Parachute Landing Falls) off a Lifeguard Tower into the sand landing on the right side, Knee, hip, shoulder,
I can see where the hip Couldn't be affected, NOT! Put in for increase due to hips, l shoulder, tinnitus,hearing loss,spinal ddd , Chronic pain, l ankle tendon rupture, Depression. I feel your pain.
As with any "Machine", one bad component will have a direct wear and tear affect on other parts it is connected to if let go too long.
Good Luck and get all your ducks in a row. File an informal claim to establish a date . Connect it to the knee and the AASLT trauma, it makes complete sense.