 In late 1600, Captain Juan Gallinato with a group of about 200 Spanish soldiers attacked Jolo but were unsuccessful.By 1601, after three months of heavy fighting, the Spanish troops retreated.In 1628, a larger raiding force of about 200 Spanish army officers and 1,600 soldiers was organised to attack Jolo to defeat the Moslem slave raiders and traders, but the Spanish again failed to take Jolo.