New Mecha

A shooting star crashed into the Earth resulting in a huge crater that held something unknown at its center in the Earth. "What was discovered" was kept undislclosed to the general public. It was foreign technology that wasn't made from any Earthling(s). Still undisclosed to the general public, "select groups of Earth's people (humans)" had been trying to do all that they could think of doing to/with that technology. Over several years, they managed to ""reverse engineer" that technology" to an extent, resulting in much of Earth's recent technological breakthroughs and achievements. AI have become commonplace in various ways/devices/robotics. Mechs have finally been brought to fruition, various models, and have become war-related weaponry and showcasings of countries' power.