Germany and Italy subsequently extended their submarine attacks to include Brazilian ships wherever they were, and from April 1942 were found in Brazilian waters. On 22 May 1942, the first Brazilian attack (although unsuccessful) was carried out by Brazilian Air Force aircraft on the . After a series of attacks on merchant vessels off the Brazilian coast by , Brazil officially entered the war on 22 August 1942, offering an important addition to the Allied strategic position in the South Atlantic.