From NUMBER@1 to NUMBER@2 , soon after the ORGANIZATION@1 and of the ORGANIZATION@2 , the two new armies fought each other in the First MISC@1 , beginning a bitter rivalry which has continued into the 21st century .

Soon after the ORGANIZATION@1 , both the newly formed armies fought each other in the LOCATION@1 War from NUMBER@1 - NUMBER@3 which begun the bitter rivalry that has continued into the 21st century .
