The Brazilian ship, the Rio Branco, was sunk by a German submarine
The Rio Branco was currently in restricted waters and was operated by the English and Norwegians. Despite the new flamed motivation to declare war on Germany, this attack could not count as an illegal attack from Germany.
The Brazilian steam boat Paraná is torpedoed by a German submarine
Brazil breaks diplomatic relations with Germany
The steamer Lapa Brazil is hit by three torpedoes from a German submarine
The captured Brazilian freighter Macau was torpedoed by the German submarine U-93
Brazilian president Venceslau Brás declares war against the Central Powers
Division Naval Operations of War (DNOG) is appointed by the Admiral Alexandre Faria de Alencar
German ships are torpedoed by the Brazilian Maceió German submarine U-43
The Medical Mission is authorized by General Aché and led by Dr. Nabuco Gouveia
Treaty of Versailles is passed, end of World War I
