The Empire of Japan knew that anyway and sent his men to them for some reason. Just for karma. All I know is that when the IGE threw the grenade. The Empire of Japan forgot to do something, ordered his troops to fix bayonets, and he and his men charged into that group
In an instant. The IGE's mood was switched from peace to war. He grabbed the nearest thing he could find and tossed that thing at Mommy Mearest. That thing was a grenade and it went off right over Mommy Mearest. That's karma. A bloody one as she had to go to a hospital for shrapnel