Cities don't actually have a location. They are a property of a zone. Let's start here.

src/engine/objects/City.java

@@ -110,7 +110,7 @@ public class City extends AbstractWorldObject {
             if (establishedTimeStamp != null)
                 this.established = java.time.LocalDateTime.ofInstant(establishedTimeStamp.toInstant(), ZoneId.systemDefault());
 
-            this.location = new Vector3fImmutable(rs.getFloat("xCoord"), rs.getFloat("yCoord"), rs.getFloat("zCoord"));
+            this.location = Vector3fImmutable.ZERO;
 
             java.sql.Timestamp realmTaxTimeStamp = rs.getTimestamp("realmTaxDate");