In the 22nd century there was a subspace corridor in the Delphic Expanse, extending 11.6 light years, from a nebula controlled by the Kovaalans, to not far from the Xindi Council planet. In February of 2154, Enterprise NX-01 entered this corridor in an attempt to quickly travel to the Council planet. However, due to battle damage sustained in combat with the Kovaalans, Enterprise's impulse manifold produced a particle wake which caused the corridor to shift in time. Enterprise emerged in the year 2037, and the crew quickly realized that, due to the corridor's one-way nature, there was no way for them to return to their own time. Enterprise became a generational ship, and the crew's descendants were eventually able to change history by intercepting their counterparts in 2154, and assisting