France. This is how we became involved
A border incident between Ethiopia and Italian Somaliland that December gave Benito Mussolini an excuse to intervene. Rejecting all arbitration offers, the Italians invaded Ethiopia on October 3, 1935.
Explanation:
Textbooks
Literature reviews and review articles (e.g., movie reviews, book reviews
Biographical works
Reference books, including dictionaries, encyclopedias, and atlases
History books and other popular or scholarly books
Commentaries and treatises