But more commonly, the technique is used to construct the equivalents of pits and city walls. Some reduced-lightspeed belts are large enough to traverse an entire arm of a galaxy. In places where the stars are dense, many reduced-lightspeed black holes can be connected together into chains that stretch for tens of millions of light-years. That’s a Great Wall at the scale of the universe. Even the most powerful fleets, once trapped, would not be able to escape. Those barriers are very difficult to cross.

When it was born, the universe was smaller than an atom, and everything within it was intermixed as a single whole; the natural connection between the universe’s small parts and its great entirety was thus determined. Though the universe has expanded to whatever its current size, this connection still exists, and if we can’t see it now, that doesn’t mean we won’t be able to in the future.

The brevity of a human lifespan tormented them as never before, and their hearts soared above the vault of time to join with their descendants and plunge into blood and fire in the icy cold of space, the eventual meeting place for the souls of all soldiers.