Video: 'The New Alpine Front - Italy Joins World War 1 I THE GREAT WAR Week 44' (May 23, 1915, at 0:44)

(Sunday, May 23, 1915, 3:30 p.m. Central European Time; on the Italian Front of World War I) — Italy declared war on Austria-Hungary today following secret promises made by Allies in the Treaty of London.

Video: 'Italian front in World War I'