David S Day 23

 4/6. Perfect defense against me should once again be easy. 

1. Libreville :), D11. I knew the capital. 
2. Green Bay Packers :), D20. Didn’t hear about this (somehow), but I knew they were one of the oldest two NFL teams, and Green Bay is pretty small. 
3. Valladolid :(, D22. No idea. Just went with the capital of the region. 
4. Van Halen :(, D31. Didn’t know Aerosmith was from Boston. 
5. Femur :), D02. Didn’t know what half the words in the question meant, but something equivalent to the humerus has to be the femur. 
6. Ortho :), D13. Got it from orthogonal.