I think this is a vast understatement of the Veneziano amplitudes, which were used to explain Regge Trajectories and involved (dare I use the pun -- entangled?) with the Strong Force...or more precisely, "gluon fluxtubes" (a sort of proto-string object).
It's fascinating stuff, so I'll give you some review papers to gaze upon:
New Strings for Old Veneziano Amplitudes I.Analytical Treatment http://arxiv.org/abs/hep-th/0410242"
New strings for old Veneziano amplitudes II. Group-theoretic treatment http://arxiv.org/abs/hep-th/0411241"
New Strings for Old Veneziano Amplitudes III. Symplectic Treatment http://arxiv.org/abs/hep-th/0502231"
New strings for old Veneziano amplitudes IV.Connections with spin chains and other stochastic systems http://arxiv.org/abs/0805.0113"