The Gladstone Ministry was defeated in 1885 and succeeded by a Conservative Cabinet under the Marquis of Salisbury. Following the outbreak of a war in Burma in the fall of 1885, English troops entered the capital, and in 1886 Burma's annexation was announced. Internal dissensions brought about two changes of cabinets in 1886, bringing in Gladstone again, but only for four months, when Lord Salisbury returned to the premiership. Zululand was the next addition to Great Britain's possession, its annexation being announced in 1887. In the same year the fiftieth anniversary of Queen Victoria's accession to the throne was celebrated with great splendor at London, and became a means of strongly emphasizing Disraeli's imperialistic idea. It brought together the most noteworthy gathering of rulers of nations, and led undoubtedly to an exchange of views which, at least for a short time, had a beneficial influence on the world's peace. In 1889 the British South African Company was chartered and the foundation was laid thereby for the immense expansion of England in South Africa. In 1890 Germany and England adjusted various difficulties in regard to their respective spheres of influence in Africa by signing a treaty. This gave to England a protectorate over Zanzibar, in exchange for which it ceded the island of Helgoland to Germany. Though this adjustment was not popular in either country, and especially not in Germany, it led to a betterment of conditions between England and Germany, as it removed at least one source of continual dissension by adjusting the African question. The young German Emperor accompanied by the Empress, paid a visit to his grandmother, Queen Victoria, in 1891, and thereby emphasized the cordiality of relations existing between the two Governments. In the summer of 1892 the Salisbury Ministry resigned as the result of renewed difficulties in Ireland, and was again succeeded by a Gladstone Cabinet.