For a long time, I have read novels, and I rarely travel to the background of the ancient period of the other world, so my world is set to be ten thousand years after the birth of the other world, and the world is still in the wild era

The hierarchical armies of the plane should all be familiar with the lowest half-plane, the primordial plane, the small thousand plane, the middle thousand plane, the great thousand plane, the god plane, and the latter ones are still under consideration

The protagonist travels back in time on the eve of the outbreak of the First War of the Gods, where the various gods fight for resources and plane leadership (and personal vendettas, of course)