March 2 – In New York City, the Martha Washington Hotel, the first hotel exclusively for women, opens. March 3 – The British Admiralty announces plans to build the Rosyth Dockyard as a naval base at Rosyth in Scotland. March 5 – The Ottoman Empire and the German Empire sign an agreement to build the Constantinople–Baghdad Railway. March 12 – The University of Puerto Rico is founded. March 13 – Having abolished the Sokoto Caliphate in West Africa, the new British administration accepts the concession of its last vizier. March 14 – The Hay–Herrán Treaty, granting the United States the right to build the Panama Canal, is ratified by the United States Senate. The Colombian senate later rejects the treaty. March 20 – The first of a series of auctions of sheep farming land in southern Patagonia takes place impacting established settlers.
March 2 – In New York City, the Martha Washington Hotel, the first hotel exclusively for women, opens. March 3 – The British Admiralty announces plans to build the Rosyth Dockyard as a naval base at Rosyth in Scotland. March 5 – The Ottoman Empire and the German Empire sign an agreement to build the Constantinople–Baghdad Railway. March 12 – The University of Puerto Rico is founded. March 13 – Having abolished the Sokoto Caliphate in West Africa, the new British, administration accepts the concession of its last vizier. March 14 – The Hay–Herrán Treaty granting the United States the right to build the Panama Canal, is ratified by the United States Senate. The Colombian senate later rejects the treaty. March 20 – The first of a series of auctions of sheep farming land in southern Patagonia takes place impacting established settlers.