Dominican sailboats and schooners had been attacked on previous occasions by German submarines as, highlighting the case of the 1,993-ton merchant ship, ""San Rafael"", which was making a trip from Tampa, Florida to Kingston, Jamaica, when 80 miles away from its final destination, it was torpedoed by the German submarine U-125, causing the command to abandon the ship by the commander. Although the crew of "San Rafael" managed to escape the event, it would be remembered by the Dominican press as a sign of the "infamy of the German submarines and the danger they represented in the Caribbean." Recently, due to a research work carried out by the Embassy of the United States of America in Santo Domingo and the Institute of Dominican Studies of the City of New York (CUNY), documents of the Department of Defense were discovered in which it was confirmed that around 340 men and women of Dominican origin were part of the US Armed Forces during the World War II. Many of them received medals and other recognitions for their outstanding actions in combat. Greece was invaded by Italy on 28 October 1940 and subsequently joined the Allies. The Greek Army managed to stop the Italian offensive from Italy's protectorate of Albania, and Greek forces pushed Italian forces back into Albania. However, after the German invasion of Greece in April 1941, German forces managed to occupy mainland Greece and, a month later, the island of Crete. The Greek government went into exile, while the country was placed under a puppet government and divided into occupation zones run by Italy, Germany and Bulgaria. From 1941, a strong resistance movement appeared, chiefly in the mountainous interior, where it established a "Free Greece" by mid-1943. Following the Italian capitulation in September 1943, the Italian zone was taken over by the Germans. Axis forces left mainland Greece in October 1944, although some Aegean islands, notably Crete, remained under German occupation until the end of the war. Before the war, Luxembourg had pursued a policy of neutrality and only became an Allied member after being invaded by Germany on 10 May 1940. The government in exile fled, winding up in England. It made Luxembourgish language broadcasts to the occupied country on BBC radio. In 1944, the government in exile signed a treaty with the Belgian and Dutch governments, creating the Benelux Economic Union and also signed into the Bretton Woods system. Mexico declared war on Germany in 1942 after German submarines attacked the Mexican oil tankers "Potrero del Llano" and "Faja de Oro" that were transporting crude oil to the United States.