Armature problems. noob.

I have created a bicycle chain.
I put an armature in it.
When I use Pose, the links are stretched, not moved or rotated.
I don’t want any deforming of the chain link objects. Just rotation.

Should I keep the chain links separate objects, or should the whole chain be one object?

Do I use armatures, or use a path, or both?

I remember seeing this once and thinking it was too advanced for me, and I don’t have a need for it, so I never read about it, have a look,it’s under animation. It’s about tank treads, but same idea I would think…