The attacking forces were composed of bluejackets and Royal Marines picked from the Grand Fleet and from naval and marine depots. Sir Eric Geddes stated in Parliament the next morning that light forces belonging to the Dover command and Harwich forces under Admiral Tyrwhitte covered the operation from the south. A large force of monitors, together with many motor launches and small, fast craft took part. One of the essentials of success was the creation of a heavy veil of artificial fog or smoke. The officer who developed this phase of the attack was killed in action. The general plan was to attack the guns and works on the Zeebrugge mole with storming parties, while the concrete-laden cruisers were being sunk in the channel. Two old and valueless submarines filled with explosives were to be blown up against the viaduct connecting the mole with the shore. STORY OF THE FIGHTING A detailed narrative of the affair was issued by the British Admiralty on the 25th, the essential passages of which are as follows: The night was overcast and there was a drifting haze. Down the coast a great searchlight swung its beam to and fro in the small wind and short sea. From the Vindictive's bridge, as she headed in toward the mole, with the faithful ferryboats at her heels, there was scarcely a glimmer of light to be seen shoreward. Ahead, as she drove through the water, rolled the smoke screen, her cloak of invisibility, wrapped about her by small craft. This was the device of Wing Commander Brock, without which, acknowledges the Admiral in command, the operation could not have been conducted. A northeast wind moved the volume of it shoreward ahead of the ships. Beyond it was the distant town, its defenders unsuspicious. It was not until the Vindictive, with bluejackets and marines standing ready for landing, was close upon the mole that the wind lulled and came away again from the southeast, sweeping back the smoke screen and laying her bare to eyes that looked seaward. There was a moment immediately afterward when it seemed to those on the ships as if the dim, coast-hidden harbor exploded into light. A star shell soared aloft, then a score of star shells. The wavering beams of the searchlights swung around and settled into a glare. A wild fire of gun flashes leaped against the sky, strings of luminous green beads shot aloft, hung and sank. The darkness of the night was supplemented by a nightmare daylight of battle-fired guns and machine guns along the mole. The batteries ashore awoke to life. Landing on the Mole It was in a gale of shelling that the Vindictive laid her nose against the thirty-foot high concrete side of the mole, let go her anchor and signaled to the Daffodil to shove her stern in.