The international response to the Spanish Civil War included many non-Spaniards participating in combat and advisory positions. The governments of Italy, Germany and, to a lesser extent, Portugal contributed money, munitions, manpower and support to the Nationalist forces, led by Francisco Franco. Some nations that declared neutrality favored the nationalists indirectly. The governments of the Soviet Union and, to a lesser extent, France and Mexico, aided the Republicans, also called Loyalists, of the Second Spanish Republic. The aid came even after all the European powers had signed a Non-Intervention Agreement in 1936. Although individual sympathy for the plight of the Spanish Republic was widespread in the liberal democracies, pacifism and the fear of a second world war prevented them from selling or giving arms. However, Nationalist pleas were answered within days by Adolf Hitler, Benito Mussolini and António de Oliveira Salazar. Tens of thousands of individual foreign volunteers travelled to Spain to fight, the majority for the Republican side. Non-intervention in the Spanish Civil War List of foreign ships wrecked or lost in the Spanish Civil War Non-intervention had been proposed in a joint diplomatic initiative by the governments of France and the United Kingdom, which responded to antiwar sentiment. France was also worried that sympathisers of the Nationalists would cause a civil war in France. Non-intervention was part of a policy aimed at preventing a proxy war and the escalation of the war into a second world war. On 3 August 1936, Charles de Chambrun presented the French government's non-intervention plan, and Galeazzo Ciano promised to study it. The British, however, immediately accepted the plan in principle. The next day, it was put to Germany by André François-Poncet. The German position was that such a declaration was not needed. A similar approach was made to the Soviet Union. On 6 August, Ciano confirmed Italian support in principle.