Their allotment to batteries was decided by circumstances. The 6-inch and 120-millimetre guns, being powerful and having long range, were placed on those points whence they could best attack the enemy's siege guns. The 47-millimetre, 37-millimetre, and other smaller guns, were placed in the first line in the intermediate works and in the trenches between them, principally with a view to repelling assaults. Except the 2½-inch Baranovsky, these guns only had common shell, but their accuracy, rapidity of fire, and the abundance of stores for them, made them suitable for this purpose. The 75-millimetre guns were told off to the first and second lines as auxiliary armament against the enemy's nearest siege and field batteries.
This system of allotment of naval guns was not very strictly adhered to, for it was felt that they were only lent temporarily, and would have to be returned directly the ships' repairs were completed. For this reason, and owing to the anxiety to mount them as quickly as possible on account of the enemy's rapid advance, the 6-inch Canet guns were mounted on separate batteries, newly built for them, and on such of the forts and positions as were completed. It was not sound; and later, when the Japanese began to pound the forts containing these guns, they were at once silenced, and it was very difficult to remove and replace them. It was in some cases impossible owing to the destruction done by the enemy's fire—for instance, when the bridges over the ditches were damaged.
The fortress howitzers were not mounted in accordance with the authorized armament table, though the character of the ground rendered them essential. The 6-inch howitzers were of little use, having only a short range; for this reason General Smirnoff ordered eight 9-inch coast howitzers to be mounted in two batteries on the land side. They were taken from the coast batteries, where they had been quite idle, and were mounted in rear of the first line, from which position they did excellent work against the enemy's siege batteries, approaches, and places of concentration. They were of the greatest use up to the end of the siege.
For the twenty 6-inch (43 cwt.) guns (latest pattern) which arrived in the Fortress in March and the twenty-one carriages (1877 pattern) new batteries were built. The carriages had to be adapted to the guns, but it was a very difficult operation and not successful, and they were continually under repair.
On the land front new batteries were being constructed right up to the end of the siege, to take either fresh guns from the fleet or repaired Chinese guns, and whenever the plan of defence was changed the guns again had to be moved.
Most of the heights round Port Arthur on which the forts and batteries settled on by the Committee (which had drawn out the scheme for the armament of the Fortress) were placed were sloping on the outer side, while on the inner they ran sharply down into deep ravines. It was, therefore, almost impossible to site these batteries to shoot well and yet to keep them concealed. If they were placed near the top, there was very little ground in rear of the guns, and they were visible; if they were placed further back and down the rear slope, all idea of shelling the approaches up the front slope would have to be given up. This was the reason why permanent batteries and fortifications were placed on open ground where they were visible to the enemy, and why guns were mounted in the open on the permanent forts.
The reserve of guns was originally intended to be organized by units of artillery, but in April it had to be broken up to arm new points. Later on another reserve was formed of guns from the unattacked left flank of the western front and from the central wall.
The Chinese wall, which played such an important part in the defence, merits some description. Along the line of old Chinese batteries, from A up to Tumulus Battery, the Chinese had built a continuous mud wall—a dense mass of clay revetted with stone—14 feet thick at bottom, and 2 to 4 feet thick at top. It was 10½ feet high, and had a banquette all along the inner side; the outer had a slope of about 45°. Where the roads from the town passed through it had traversed openings and gun emplacements. There were three such openings on the eastern front—at A Battery, Wolf's Battery, and in the ravine between Fort Erh-lung-shan and Fortification No. 3. Before the war no one dreamed of this wall being of use, and not only was it not kept in repair, but in places stones and earth were taken from it. It eventually proved most valuable; it is doubtful if we could without it have managed to repulse so successfully some of the assaults. When the eastern front was manned, General Smirnoff had the wall repaired and loopholed; splinter proofs and barbettes for the guns were built, and small guns for repulsing attacks were mounted. It was frequently hammered by the enemy's guns, even by their 11-inch howitzers, but little real damage was done to it, and to the end the enemy could not drive us back from it or breach it beyond repair. Only a small portion of it near Fort Erh-lung-shan was abandoned just before the capitulation, and this was done by General Fock's order, but was not really necessary.
The following tables bear witness to the state of the Fortress on the outbreak of hostilities: