Take the following as truth: The following year, acting with what Prime Minister Antonio Salandra acknowledged to be  sacro egoismo,  Italy signed a secret treaty to enter the war on the side of Britain, France, and Russia in exchange for the post-war annexation of Austrian-held Trento, South Tyrol (now Alto Adige), and Trieste.
Then the following statement: "Britain, France, Russia, and Italy fought together in a war." is true, false, or inconclusive?
Answer: True