Vice-Admiral Sadakichi Kato, who commanded the approaching squadron, immediately upon arrival took measures to protect himself against danger from mines. Seven islets clustering round the mouth of Kiao-chau Bay were occupied, to form a convenient local naval base, while mine-sweepers swept the surrounding seas. No less than a thousand mines were taken from the water. A blockade of the whole Kiao-chau coast was declared, as commencing from 9 a.m., August 27, and war vessels patrolled the shores, some seventy miles long. Action soon began, and continued during ensuing days, with shells that at intervals screamed towards the town. The position was, however, reconnoitred carefully. Japanese airmen went up frequently to scan the fortifications and to drop bombs. All protruding structures, spires and factory-chimneys, had been levelled to the ground by the Germans so as to afford no mark for fire. Bombs were dropped on the railway station and on one of the numerous barrack buildings. The operations continued spasmodically into September, while Kato was awaiting the approach by land of a co-operating army, which had now disembarked on the northern coast of the Shantung peninsula, about 150 miles due north of Tsing-tao. [Sidenote: Landing effected.] [Sidenote: Floods hinder advance.] The landing was effected on September 2, without hindrance or opposition on the part of the Chinese. The Government, following the precedent of the Russo-Japanese War, immediately published a declaration refusing to hold itself responsible for the obligations of strict neutrality in areas that formed, within Lung-kow, Lai-chau, and the neighbourhood of Kiao-chau Bay, passage-ways essential to the belligerent troops. It was, of course, incumbent upon the Powers involved to respect Chinese property and administrative rights. Japan, therefore, was permitted to make use of the main roads to transport an army to the rear of Tsing-tao. The forces landed composed a division numbering 23,000, and commanded by Lieutenant-General Mitsuomi Kamio. An advance-guard was sent forward without delay, but soon found its way rendered impassable by torrential floods which at this time swept down upon and devastated the province of Shantung, bridges, roads, and even villages being submerged and destroyed, with great loss of life, largely owing to Chinese official incompetence. The Japanese, after covering 20 kilometres in two days, reached a stream so swollen that crossing was impossible. The artillery had to return to Lung-kow. German diplomacy, meanwhile, exasperated at its inability to prevent a Japanese landing, had not been inactive. [Sidenote: Chinese neutrality.] [Sidenote: Rivalry of British and Japanese.] [Sidenote: Japanese advance.]