WWI at Sea

The War at Sea

The real crux lies in whether we blockade the enemy to his knees, or whether he does the same to us.

Admiral of the Fleet David Beatty, 1917

Although there were naval actions all over the world during the war, there was only one significant sea-battle during the First World War – the Battle of Jutland in May 1916; more than 250 ships on both sides were involved. But some historians believe that the war was won and lost at sea, because neither Britain nor Germany could grow enough food to feed their people. The side that ruled the sea would win the war.

Going Deeper

The following links will help you widen your knowledge:

Good account from BBC Bitesize

U-boat warfare and the US

Voices of WWI: August 1914 (plus transcript) - IWM

YouTube

Really clear, simple account from whawkvideo

The U-boat campaign against Britain

The Germans used a new invention – the U-boat (‘undersea boat’) – to sink ships bringing food and supplies to Britain.

At first, they attacked the Royal Navy; by the end of 1914, German U-boats had sunk British 9 warships. However, British warships started travelling in a zigzag at speed, and the U-boats were unable to catch them to attack.
The Germans also used submarines to lay mines in British coastal waters.
In February 1915, as a retaliation to the British naval blockade, the German Admiralty announced a war zone around Britain, within which the Germans said they would sink ANY ship sailing to Britain ('unrestricted submarine warfare').
Up to February 1915, the Germans had only sunk 10 British ships. By August 1915 they were sinking two ships a day. Britain depended on merchant trade for food, but also for raw materials for war production.

Did You Know

The first submarine flotilla in history took place in August 1914 when 10 U-boats set off from Heligoland. One broke down and had to return to base; another was rammed and sank; another sank of its own accord.. Just one torpedo was fired; it missed.

The "War Zone" announced by Germany on 4 February 1915.

The suspension of unrestricted submarine warfare

The danger with unrestricted submarine warfare was that neutral ships were sunk, and neutral citizens killed.

The American public was outraged when a U-boat sank the Harpalyce, a ship taking food to starving Belgians (and clearly marked as such).
There was even greater outrage in May 1915, when the Lusitania, a passenger ship sailing from America to Britain was sunk with the loss of 1,200 men, women and children.
President Wilson warned Germany in three separate notes, the last of which (21 July) stated that sinkings of US ships would be regarded as ‘deliberately unfriendly’.
When U-24 sank the liner SS Arabic, outward bound for America, in August 1915, killing 3 American passengers, therefore, the Germans stopped unrestricted attacks.
After the sinking of the Sussex, an unarmed French boat, in March 1916, Wilson threatened to cut diplomatic relations with Germany ... as a result which the Germans agreed the 'Sussex Pledge' - not to attack passenger ships, and to allow crews of merchant ships to abandon ship before sinking it.

May 1915, the Lusitania is sunk. Unknown to the passengers, the Lusitania was secretly carrying bullets and shells to Britain, which was why the ship blew up and sank so quickly.

The sinking was a disaster for the Germans. The British government put out propaganda saying that the Germans were cruel killers of civilians. More importantly, 128 Americans were among the dead.

Anti-submarine measures

The British tried different ways to stop the U-boats.

Q-ships: U-boats did not carry many torpedoes, so – when they found a ship on its own – U-boat captains came to the surface and sank it with their deck guns. To stop this, the British government started to put guns on merchant ships. From June 1915 they deployed Q-ships – which looked like a merchant ship, but were really well-armed warships. When the U-boat surfaced to attack what it thought was a merchant ship, the Q-ship would attack it.
Depth charges: The British introduced the first effective depth charge, the Type D, in January 1916. But because hydrophones (to listen for the sound of U-boats) had not been fully developed by the end of the war, British battleships found it hard to find any U-boats to attack.
Mines and submarine nets in the English Channel.

However, these measures proved ineffective, and by the end of 1916, the British had only sunk 15 U-boats. Yet by the end of 1916 German U-boats were sinking 1 in 4 merchant ships sailing to Britain. At one point, in 1917, Britain only had only two month’s supply of flour.

Rationing was introduced in Britain after December 1917, and ration books for butter, margarine, lard, meat, and sugar issued in July 1918.

Was Britain really ‘in danger of losing the war’? Studies have shown that average energy intake decreased very little during the war.

The resumption of unrestricted submarine warfare

In 1917, after a furious debate, the German Admiralty again took the risk of unrestricted submarine warfare. The key was a study which predicted that, if the U-boats could sink 600,000 tons of shipping a month, Britain would be forced to sue for peace within six months.

On 31 January 1917, therefore – after Admiral Holtzendorff promised: “not one American will land on the Continent" – the Kaiser signed the order. And Holtzendorff was correct: US President Woodrow Wilson broke off diplomatic relations in February 1917, but he did not declare war. Many Americans were isolationist and Wilson had won the 1916 election with the slogan “He Kept Us Out of War” – it took the Zimmermann telegram to make America declare war on Germany on 6 April 1917.

Source A

Shipping losses from U-boat action, 1914-18.

Anti-submarine measures (continued)

The uptick in shipping losses forced the British to develop further ways of protecting shipping.

Convoys: After April 1917, the British started to use convoys; merchant ships sailed in groups of 20 or more ships, protected by battleships with depth charges.
This made it much harder for the U-boats to attack, even using torpedoes. As soon as they attacked one ship, the battleships knew where they were and could fight back with depth charges. By 1918, the U-boats were only sinking 1 in 25 merchant ships sailing to Britain.
American help: After the USA entered the war in April 1917, also, American battleships protected the convoys as well as British battleships. In August 1917, German U-boats sank 211 merchant ships but a year later shipping losses had been halved, and fell rapidly thereafter.
Also, America started sending American wheat to Britain (before, the only wheat going to Britain was from Australia, on the other side of the world).

Shipping losses from U-boat action, 1914-18. This graph is compiled from this webpage; if you look at the list, you will see which were the most effective ways of countering the U-boats. You will also see that U-boat technology was still in its infancy.

The Battle of Jutland, May 1916

While the German U-boats were trying to sink British merchant shipping and starve Britain to death, the British navy was blockading German ports to try to starve the Germans to death.

In 1916, the German navy came out to try to break the blockade. The British Grand Fleet was commanded by Admiral Jellicoe and the Germany Hugh Seas Fleet by Admiral Scheer. On 31 May 1916 they opened fire on each other. The two fleets were 15 km apart.
The German gunners were better than the British gunners. Also, the German shells went easily through the British ships' armour and blew up their ammunition stores; three British ships just blew up. Admiral of the Fleet David Beatty commented: “There seems to be something wrong with our bloody ships today.”
British losses were much greater. The British lost 14 ships – 3 of them battleships – and 6,000 men killed. The Germans lost 11 smaller ships (only one big battleship) and just 2,550 men.
Although he was winning the battle, Admiral Scheer was worried. The British fleet was much bigger than the German fleet. Scheer knew that if he lost this battle, German would lose the war. He turned away and went back to port.
Jellicoe also knew that if he lost this battle, Britain would lose the war. He did not try to stop Scheer getting away.

Consider:

1. Make a list of the key dates in the battle with the U-boats.

a. Click on the graph of shipping lost (Source A) to bring up a larger version; can you link the shape of the graph to the developments in the battle with the U-boats?

b. Now repeat, comparing the graph of U-boats lost (Source B) to the key developments in the U-boat war - which developments seem to have had little effect, and which were more successful?

2. Make a table of U-boat 'successes' and 'failures', and use it to write an essay: "How successful was the German U-boat campaign?"

3. What points would you make if you were asked to argue that the War at Sea was the Allies' 'war-winning-weapon'? What points would you make if you were asked to argue against that view?

When is a defeat not a defeat?

The Germans claimed victory, but they never left port again (and, when ordered to do so in November 1918, the sailors mutinied).

So, although the Germans gave the British navy a bloody nose, the blockade continued. The German people got more and more hungry. The German Board of Public Health claimed that three-quarters of a million Germans died from hunger and disease associated with the Blockade, and scurvy, tuberculosis and dysentery were widespread. In 1918, Germans were living on K-Brot, potatoes and berries; there were Hunger Riots in Germany in autumn 1915, summer 1916, and September 1918; and – fearing a Communist revolution – the German government was forced to end the war.

In this way, Jellicoe’s ‘defeat’ at Jutland can be classified as a ‘war-winning weapon’!