By January 1944, the front was pushed back by the Soviet Army almost all the way to the former Estonian border. Narva was evacuated. Jüri Uluots, the last legitimate prime minister of the Republic of Estonia (according to the Constitution of the Republic of Estonia) prior to its fall to the Soviet Union in 1940, delivered a radio address that implored all able-bodied men born from 1904 through 1923 to report for military service. (Before this, Uluots had opposed Estonian mobilization.) The call drew support from all across the country: 38,000 volunteers jammed registration centers. Several thousand Estonians who had joined the Finnish army came back across the Gulf of Finland to join the newly formed Territorial Defense Force, assigned to defend Estonia against the Soviet advance. It was hoped that by engaging in such a war Estonia would be able to attract Western support for the cause of Estonia's independence from the USSR and thus ultimately succeed in achieving independence.