Mussolini Plunges Nation Into Maelstrom by Announcing Formal Declaration ofWar Handed to AlliesRome, June 10 (AP, via radio).—A declaration of war has been given to the ambassadors of France and England, Benito Mussolini said today.Premier Mussolini told the Italian nation “an hour important to the destiny of Italv has now begun.”Mussolini, speaking from a balcony of the Palazzo Venezia overlooking the Piazza Venezia, jammed with cheering, shouting members of the Fascist party, soldiers and :civilians, said:“Our conscience is perfectly tranquil.' The crowds in the piazza roared approval.