The particular city that Alita and the girls were entering was called Blackbird City. The city was named after a big black bird that would fly over the city during a crazy battle that occurred a century ago.
This bird would fly over the city scaring the enemy soldiers from coming anywhere near the village. In the end, the people from the village didn't suffer any casualties.
Although life wasn't easy as they couldn't get rations out of the village, they didn't get to see how horrible the war was. After the enemies were defeated, the big bird also vanished.
After that, the village became very famous and transformed into a city as years passed.
Currently, Blackbird city was being managed or led by the City Lord Blackfeather and this position had been passed down from one generation to another for the past seventy years.