Nazi Germany had invited Lithuania to join the invasion of Poland and retake the historical capital Vilnius by force; however, President Antanas Smetona and most of the Lithuanian politicians declined this offer because they had doubts about Adolf Hitler's eventual victory and were outraged by the 1939 German ultimatum to Lithuania. Instead, they supported the neutrality policy and after being encouraged by the French and British diplomats – Lithuania adopted the Neutrality Act, which was supported by all the political forces.