While such was the perennial condition of political unrest, a rebellion of a different sort broke out at Seoul in 1885--an anti-foreign rebellion--which had for its purpose the expulsion of all the foreign legations. This led to negotiations between China and Japan having an important bearing upon subsequent events. Li Hung Chang, representing China, and Marquis Ito, the Japanese Foreign Minister, held a conference (1885) at Tien-tsin, which resulted in what is known as the "Li-Ito treaty." In view of the disorders existing, it was agreed that their respective governments should hold a joint control in Korea, each having the right to dispatch troops to the peninsula if required. This agreement was later expanded into a joint occupation until reform should be established insuring security and order. These negotiations left Korea as before an independent state, although tributary to China. The Koreans attributed their calamities to their Queen, a woman of intelligence and craft, who managed to keep her own family in the highest positions and also, by intriguing with China, to thwart Japanese reforms. It soon became apparent that so far from co-operating in these reforms, which were an essential part of the Li-Ito agreement, China intended to make them impossible. The Government at Tokio came to a momentous decision. In 1894 an outbreak more serious than usual occurred, known as the "Tong-Hak Rebellion." Li Hung Chang promptly sent an army from Tien-tsin for its suppression, another from Japan coming simultaneously. But the Japanese army poured into Chemulpo in such numbers and with a perfection of equipment suggesting a purpose not mentioned in the Li-Ito agreement! China's protest was met by open defiance, Japan declaring that, as the convention of 1885 had been violated, she should no longer recognize the sovereignty of China in Korea. War was declared Aug. 1, 1894. The Mikado's Government was not unprepared for this crisis. There were no surprises awaiting the army of little men as they poured into Korea. They knew the measurements of the rivers, the depth of the fords and every minutest detail of the land they intended to invade. Their emissaries in disguise had also been gauging the strength and the weakness of China from Thibet to the sea. They knew her corruption, her crumbling defenses, her antique arms and methods, the absence of all provision for the needs of an army in the field. With a bewildering suddenness and celerity the plan of the campaign developed. First the control of Korea was secured, then the command of the sea, then the Yalu was crossed; and while one division of the army was pouring into Manchuria, threatening Niu-Chwang and beyond that Mukden, a second division landed at Pitsewo, making a rapid descent upon Port Arthur, the chief stronghold of China, which was captured by assault Nov. 20, 1894.