Line of battle

The line of battle is a tactic in naval warfare in which a fleet of ships forms a line end to end. The first example of its use as a tactic is disputed—it has been variously claimed for dates ranging from 1502 to 1652. Line-of-battle tactics were in widespread use by 1675.

Compared with prior naval tactics, in which two opposing ships closed on one another for individual combat, the line of battle has the advantage that each ship in the line can fire its broadside without fear of hitting a friendly ship. This means that in a given period, the fleet can fire more shots. Another advantage is that a relative movement of the line in relation to some part of the enemy fleet allows for a systematic concentration of fire on that part. The other fleet can avoid this by manoeuvring in a line itself, with a result typical for sea battles since 1675: two fleets sail alongside one another (or on the opposite tack).

Early development

The first recorded mention of the use of a line of battle tactic is attested from 1500. The ''Instructions'' provided in 1500 by King Manuel I of Portugal to the commander of a fleet dispatched to the Indian Ocean suggests its use predated the written instructions. Portuguese fleets overseas deployed in line ahead, firing one broadside and then putting about in order to return and discharge the other, resolving battles by gunnery alone. In a treatise of 1555, ''The Art of War at Sea'', Portuguese theorist on naval warfare and shipbuilding, Fernão de Oliveira, recognized that at sea, the Portuguese "fight at a distance, as if from walls and fortresses...". He recommended the single line ahead as the ideal combat formation.

Line-of-battle tactics had been used by the Fourth Portuguese India Armada at the Battle of Calicut, under Vasco da Gama in 1502, near Malabar against a Muslim fleet. One of the earliest recorded deliberate uses is documented in the First Battle of Cannanore between the Third Portuguese India Armada under João da Nova and the naval forces of Calicut, earlier in the same year. Another early, but different form of this strategy, was used in 1507 by Afonso de Albuquerque at the entrance to the Persian Gulf, in the first conquest of Ormuz. Albuquerque commanded a fleet of six carracks manned by 460 men, and entered Ormuz Bay, being surrounded by 250 warships and a 20,000 men army on land. Albuquerque made his small fleet (but powerful in its artillery) circle like a carrousel, but in a line end-to-end, and destroyed most of the ships that surrounded his squadron. He then captured Ormuz.

While it is well documented that Maarten Tromp first used it in the action of 18 September 1639 some have disputed this. One of the first precise written instructions adopting the line of battle tactic were contained in the English Navy's Fighting Instructions, written by Admiral Robert Blake and his colleagues, and published in 1653. Captains on both sides of the First Anglo-Dutch War appear to have experimented with the technique in 1652, possibly including Blake at the Battle of Dover.

From the mid-16th century, the cannon gradually became the most important weapon in naval warfare, replacing boarding actions as the decisive factor in combat. At the same time, the natural tendency in the design of galleons was for longer ships with lower forecastles and aftercastles, which meant faster, more stable vessels. These newer warships could mount more cannons along the sides of their decks, concentrating their firepower along their broadside.

Until the mid-17th century, the tactics of a fleet were often to "charge" the enemy, firing bow chaser cannon, which did not deploy the broadside to its best effect. These new vessels required new tactics, and "since ... almost all the artillery is found upon the sides of a ship of war, hence it is the beam that must necessarily and always be turned toward the enemy. On the other hand, it is necessary that the sight of the latter must never be interrupted by a friendly ship. Only one formation allows the ships of the same fleet to satisfy fully these conditions. That formation is the line ahead olumn This line, therefore, is imposed as the only order of battle, and consequently as the basis of all fleet tactics."

The line-of-battle tactic favoured very large ships that could sail steadily and maintain their place in the line in the face of heavy fire. The change toward the line of battle also depended on an increased disciplining of society and the demands of powerful centralized government to keep permanent fleets led by a corps of professional officers. These officers were better able to manage and communicate between the ships they commanded than the merchant crews that often comprised large parts of a navy's force. The new type of warfare that developed during the early modern period was marked by a successively stricter organization. Battle formations became standardized, based on calculated ideal models. The increased power of states at the expense of individual landowners led to increasingly larger armies and navies.

A ship that was powerful enough to stand in the line of battle came to be called a '' ship of the line of battle'', or ''line of battle ship''. In time this became shortened to '' battleship''.

Effective use

The line of battle often resulted in indecisive engagements. Fleet commanders sometimes met with greater success by altering or abandoning the line of battle outright, by breaking the enemy line and moving through it, as occurred during the Four Days Battle, Battle of Schooneveld, and the Battle of Trafalgar. Another tactic cut off and isolated part of the enemy's line, while concentrating a stronger force on it (which happened during the Battle of Texel and the Battle of the Saintes.

If the opposing fleets were of similar size, a portion of the line might be overwhelmed by focused gunfire of the entire enemy line by tactic known as ''doubling''. Ships broke through the enemy line and then, acting simultaneously with other vessels that remained on the original side, would engage the enemy fleet.

Weaknesses

The main problem with the line of battle was that when the fleets were of similar size, naval actions using it were generally indecisive. The French in particular were adept at gunnery and would generally take the leeward position to enable their fleet to retire downwind while continuing to fire chain-shot at long range to bring down masts. Eventually so many vessels in a line would be damaged that they would be forced to retire for repairs while the French took few casualties and very little damage.

Age of Steam and later developments

With the introduction of ironclad warships, the line of battle tactic was believed to be obsolete, and naval tactics became for a period chaotic. Some experts held that ironclads were invulnerable to gunfire, and so ramming became a popular method of attack, as occurred at the Battle of Lissa and the Battle of the Yalu River. Others held that naval battles would only be decided by an assault on an enemy fleet in port, by ships armed a small number of guns that could fire in any direction.

Ramming fell out of fashion, and the logic of the line of battle tactic returned. It was used in the Battle of Tsushima (1905), the Battle of Jutland (1916), and—for the last time—in the Battle of Surigao Strait (1944).

During World War II the development of aircraft carriers meant that gun engagements were no longer decisive, so that there was no longer any need for a line-of-battle formation. In modern naval warfare, a carrier battle group generally deploys in a circular formation, with the highest-value units in the centre, accompanied closely by anti-aircraft escorts, with anti-submarine escorts surrounding the formation at a distance.

See also

* Sailing ship tactics
* Naval tactics in the Age of Steam
* Crossing the T

Notes

Sources

*
*
*
*
*
*
*

Further reading

*
*
*
*
*
* {{cite book , last1=Rodger , first1=Nicholas A.M. , author-link=N. A. M. Rodger , title=The Command of the Ocean, a Naval History of Britain 1649–1815 , date=2004 , publisher=Allen Lane , location=London , isbn=978-0-7139-9411-7 , url-access=registration , url=https://archive.org/details/commandofoceanna00rodg/page/n5/mode/2up , ref=none

Naval warfare tactics
Tactical formations
Naval warfare of the Early Modern period
Age of Sail