The boot directory on your file system is where the system gets it from to put on G. It’s left there for recovery/repair
But you still have a G partition for the boot. It lets the computer itself have an easier time finding it (think labeled as boot). Your ssd is divided, it’s not a 2nd physical disk
The letter is arbitrary, so is C. It’s just the default
I won’t say Finland or Thailand were great powers but Japan had a decent showing so it’s not like they were alone
Though it really only took USSR to beat Germany