İnönü knew very well the hardships which his country had suffered during decades of incessant war between 1908 and 1922 and was determined to keep Turkey out of another war as long as he could. The young Turkish Republic was still re-building, recovering from the losses due to earlier wars, and lacked any modern weapons and the infrastructure to enter a war to be fought along and possibly within its borders. İnönü based his neutrality policy during the Second World War on the premise that Western Allies and the Soviet Union would sooner or later have a falling out after the war. Thus, İnönu wanted assurances on financial and military aid for Turkey, as well as a guarantee that the United States and the United Kingdom would stand beside Turkey in the event of a Soviet invasion of the Turkish Straits after the war. In August 1944 İnönü broke off diplomatic relations with Germany and on 5 January 1945, İnönü severed diplomatic relations with Japan. Shortly afterwards, İnönü allowed Allied shipping to use the Turkish straits to send supplies to the Soviet Union and on 25 February 1945 he declared war on Germany and Japan. For this Turkey became a founding member of the United Nations.