What if the gate didn't just open in Japan? What if another gate opens on a different Earth of an alternative timeline? How will the JSDF and "Special Region" react to the UNSC Infinity Fleet arrival? A Halo and Gate crossover.

The worst possible thing that anyone could ever do in all of the universe, would be to underestimate the strength and determination that makes up humanity. It was this mistake that lead to the rise of the deadliest species across the universe, and what had now become the greatest, most powerful space faring race recorded in intergalactic history.