Known as Persia until 1935, Iran became an Islamic republic in 1979 after the ruling shah was forced into exile. Conservative clerical forces subsequently crushed westernizing liberal elements. Militant Iranian students seized the US Embassy in Tehran on 4 November 1979 and held it until 20 January 1981. During 1980-88, Iran fought a bloody, indecisive war with Iraq over disputed territory. The key current issue is how rapidly the country should open up to the modernizing influences of the outside world.