The Second Battle of Taku Forts took place in June 1859. A British naval force with 2,200 troops and 21 ships, under the command of Admiral Sir James Hope, sailed north from Shanghai to Tianjin with newly appointed Anglo-French envoys for the embassies in Beijing. They sailed to the mouth of the Hai River guarded by the Taku Forts near Tianjin and demanded to continue inland to Beijing. Sengge Rinchen replied that the Anglo-French envoys might land up the coast at Beitang and proceed to Beijing but he refused to allow armed troops to accompany them to the Chinese capital. The Anglo-French forces insisted on landing at Taku instead of Beitang and escorting the diplomats to Beijing. On the night of 24 June 1859, a small group of British forces blew up the iron obstacles that the Chinese had placed in the Baihe River. The next day, the British forces sought to forcibly sail into the river, and shelled the Taku Forts. Low tide and soft mud prevented their landing, however, and accurate fire from Sengge Rinchen's cannons sank four gunboats and severely damaged two others. American Commodore Josiah Tattnall, although under orders to maintain neutrality, declared "blood is thicker than water", and provided covering fire to protect the British convoy's retreat. The failure to take the Taku Forts was a blow to British prestige, and anti-foreign resistance reached a crescendo within the Qing imperial court.