In Annam the rainy season begins during September and lasts for three or four months, corresponding with the northeast monsoon and also with a period of typhoons.
Next year Patenotre signed with Li Hung Chang a treaty of peace at Tien-tsin, by which the French protectorate in Annam and Tongking was recognized, and both parties agreed to remain within their own borders in the future.
East of Cape St Jacques the mountains of Annam come down close to the sea; west of that point, as far as the southern headland of Ca-Mau, the coast-line of Cochin-China runs north-east to south-west for about 160 m.
For centuries she had been distracted by wars with Cambodians, Peguans and Burmans, but the incorporation of Lower Cochin China, Annam and Tongking by the French, and the annexation of Lower and Upper Burma successively by the British, freed her from all further danger on the part of her old rivals.
Till this period the greater part of Annam had been occupied by the Chams, a nation of Hindu civilization, which has left many monuments to testify to its greatness, but the encroachment of the Annamese during the next six centuries at last left to it only a small territory in the south of the country.
In Annam where water spirits may take the form of serpents or of human beings, two deified heroes were said to have been serpents born of a childless woman, who drank from a bowl of water into which a star had fallen.
From this period the history of Cochin-China follows that of Annam (q.v.) till 1867, when it was entirely occupied by the French and became a French colony.
Of greater historical interest are the Chams, who are to be found for the most part in southern Annam and in Cambodia, and who, judging from the numerous remains found there, appear to have been the masters of the coast region of Cochin-China and Annam till they succumbed before the pressure of the Khmers of Cambodia and the Annamese.
In 1887 it was united with Cambodia, Annam and Tongking to form the Indo-Chinese Union (see Indo-China, French).
The chief towns of Annam are Hue (pop. about 42,000), seat both of the French and native governments, Tourane (pop. about 4000), Phan-Thiet (pop. about 20,000) in the extreme south, Qui-Nhon, and Fai-Fo, a commercial centre to the south of Tourane.