The War of the War Empire

A country that rose through war, and a country that rose through peace.

A serial robber transmigrates from Earth and becomes a girl. Using the heist experience he gained on Earth, she goes off to fight in a war she doesn't even know how she got involved in.

"Big sis!" a little girl shouted, running after Chi Xi.

"I'm a man!" Chi Xi shouted back.

"But you look just like a pretty big sister!"

"..."