The Armada was not just a naval campaign. The build-up of land forces to resist a Spanish invasion has been described as an administrative feat of massive scope. A survey taken in November and December 1587 showed 130,000 men in the militia, of whom 44,000 were members of the trained bands, being drilled and led by experienced captains and sergeants. By May 1588 the London bands were drilling weekly. To give warning of the enemy's approach, beacons were built, manned twenty-four hours a day by four men. Once the beacons were lit, 72,000 men could be mobilised on the south coast, with another 46,000 protecting London. For the many Englishmen caught up in the Armada the experience must have been very profound and frightening. Some shared the intimacy of beacon watching, hoping for the best, but ready to light their warning fires in case of the worst. Deloney, a London silkweaver, played on their fears in his (1588). The political philosopher Thomas Hobbes recalled that his mother was so frightened that she prematurely gave birth to twins, of whom he was one. All were terrified about what might happen if the Spanish invaded. Stories of the Sack of Antwerp in 1576, in which the Spanish led by Sancho d'Avila raped, tortured and murdered as many as 17,000 civilians, were grist for playwrights and pamphleteers such as George Gascoigne and Shakespeare. The former remembered seeing civilians at Antwerp drowned, burned, or with guts hanging out as if they had been used for an anatomy lesson. Few Englishmen, women and children doubted they faced similar fates had the Armada landed.