The Persian wars were fought against a foreign invader.
The Peloponnesian war was fought among Greeks.
On May 3, 1947, Japan's postwar constitution goes into effect. The progressive constitution granted universal suffrage, stripped Emperor Hirohito of all but symbolic power, stipulated a bill of rights, abolished peerage, and outlawed Japan's right to make war.The Constitution is best known for Article 9, by which Japan renounces its right to wage war; and to a lesser extent, the provision for de jure popular sovereignty in conjunction with the monarchy.
