One sub would apear in the middle of the convoy and then when the ships would fire at it the other subs in the wolf pack would sink the bouts on the rim and then they would repeat this several times. and if the ships did not fire apon the sub in the middle then it would sink the ships from the midle out.
Germany resumed unrestricted submarine warfare in 1917, which, consequently, encouraged American involvement in World War I, and in the following months, American entered the fray of the Great War against the Central Powers
Warning: Be wary of the above answer: I'm fairly certain submarines did not play a very significant part in World War I
Actually Americans introduced the submarine. During the American Revolution a Connecticut sergeant volunteered as the one-man crew of Bushnell's "Turtle" in an unsuccessful attempt to sink a British warship. During the US Civil War the Rebels used a submersible boat, the Hunley, to make the first successful submarine sinking of an enemy vessel in Charleston Harbor. The Hunley went down on the way back to shore drowning its entire crew - the fourth entire crew this had happened to. That time the Rebels left her on the bottom.
Around 1900, an American inventor, Holland, developed the first practical sea-going submarine, utilizing many of the concepts still in use today. However, he had little success interesting the admirals of the US Navy in his invention. So he took it overseas, where he found an eager customer in Germany.
The Germans had several dozen U-boats when WWI began. Less than two months into the war, on September 22, 1914, one of these sank three large warships of the British Royal Navy with torpedoes. When the first was hit, the other two stopped to pick up survivors, thinking it had hit an underwater mine, so the sub captain was able to bag all three.
The renewal of unrestricted German submarine warfare had devastating effects on shipping in 1917. In terms of tonnage, the Germans sank 540,000 tons in February 1917, 578,000 in March and 874,000 tons in April. Anti-submarine measures by the Allies, however, began to reduce this calamity.
Several incidents led to the USA joining ww1 such as the bombing of the Lusitania but I suppose they joined the war principally because of the re-introduction of Unrestricted Submarine Warfare by the Kaiser...
President Wilson was prompted to lead the United States into World War I by several factors. The most important was the unrestricted submarine campaign announced and then enacted by Germany, which led to the loss of American lives and goods. Also involved was a more general pro-war and anti-Germany sentiment that had increased among Americans.The US were not happy with Germany due to the policy of unrestricted submarine warfare that they were emplying on ships heading to Britain which was causing the deaths of many American civilians. However this alone was not enough to turn public opinion completely against Germany as Britain was blockading the German coast aswell (but not as violently).But when the US government discovered that the Germans were brokering an alliance with the Mexicans, offering to assist them in claiming back territory it had previously lost to the US, that was the decisive tipping point for the American public who began to call for war.
unrestricted trade
When war began in 1914, the U.S. decided to remain neutral. However they entered the war in 1917 mainly because the German ambassador announced the continuation of submarine warfare, and ended diplomatic relations with the U.S. And also because a foreign minister, in an attempt to eliminate the threat of American involvement in Europe, tried to provoke Mexico and Japan into attacking the U.S., a message containing the minister's intent was decoded by the British and sent to the U.S. Because of these two reasons President Wilson asked Congress for permission to go to war.
The renewal of unrestricted German submarine warfare had devastating effects on shipping in 1917. In terms of tonnage, the Germans sank 540,000 tons in February 1917, 578,000 in March and 874,000 tons in April. Anti-submarine measures by the Allies, however, began to reduce this calamity.
The tactic began in WWI and is known as Unrestricted Submarine Warfare.
Several incidents led to the USA joining ww1 such as the bombing of the Lusitania but I suppose they joined the war principally because of the re-introduction of Unrestricted Submarine Warfare by the Kaiser...
France had been a close American ally for over a hundred years. Germay had began the policy of unrestricted submarine warfare which included the sinking of the Lusitania in 1915.they did it for milk and cookies
In World War I, Germany's use of U-boats (or, submarines) led to conflict with the United States for two reasons. First, the general American reaction to the use of U-boats, especially when utilized in an unrestricted manner, was thoroughly negative. This kind of warfare was often considered to be unlawful, cruel, even unfair. Second, the loss of American lives and goods when the U-boats began to sink American ships (despite their neutrality) led to war-fever at all levels of American society.
Basically, since the invention and more widespread use of the submarine, there were certain rules of warfare regarding them. Submarines, when they wanted to sink a ship (when it wasn't an obvious military ship), were supposed to pop up out of the water so that the ship could see them; then someone from the submarine was expected to tell the ship that the submarine was going to sink it. The submarine had to give the other ship time to evacuate the crew to lifeboats and get a safe distance away. Once all that was done, the submarine was allowed to sink it.Obviously, that doesn't work well when you want to get stuff done fast. Germany's navy was far smaller and weaker than Britain's; throw in France's and those of other countries, and Germany was at a considerable disadvantage. Germany needed to be able to hit hard and fast without having to slow down if they wanted to have any chance at defeating the Allied navies.So unrestricted warfare was basically ignoring those old-fashioned rules. They began sinking ships without warning, meaning crewmen were getting killed, and the whole ship was lost. German subs would sometimes accidentally shoot neutral ships, like those belonging to the US, or shoot ships carrying people from neutral countries (like the British cruise ship, the HMS Lusitania, which had over 100 Americans on board when the Germans sank it).Germany agreed to stop unrestricted submarine warfare after the Lusitania incident, because they didn't want the US to join the Allies. But in early 1917, they decided that they couldn't keep that up, and had to restart it. This, coupled with their attempt to secretly convince Mexico to declare war on the US, angered the Americans enough that they declared war on Germany in April 1917.
Germany was sinking cargo ships supplying the Allies (Britain, France) and temporarily halted its policy of unrestricted submarine warfare. The resumption of this policy, combined with other factors, led to the US declaration of war in 1917, some three years after the fighting began in 1914.
President Wilson was prompted to lead the United States into World War I by several factors. The most important was the unrestricted submarine campaign announced and then enacted by Germany, which led to the loss of American lives and goods. Also involved was a more general pro-war and anti-Germany sentiment that had increased among Americans.The US were not happy with Germany due to the policy of unrestricted submarine warfare that they were emplying on ships heading to Britain which was causing the deaths of many American civilians. However this alone was not enough to turn public opinion completely against Germany as Britain was blockading the German coast aswell (but not as violently).But when the US government discovered that the Germans were brokering an alliance with the Mexicans, offering to assist them in claiming back territory it had previously lost to the US, that was the decisive tipping point for the American public who began to call for war.
President Wilson was prompted to lead the United States into World War I by several factors. The most important was the unrestricted submarine campaign announced and then enacted by Germany, which led to the loss of American lives and goods. Also involved was a more general pro-war and anti-Germany sentiment that had increased among Americans.The US were not happy with Germany due to the policy of unrestricted submarine warfare that they were emplying on ships heading to Britain which was causing the deaths of many American civilians. However this alone was not enough to turn public opinion completely against Germany as Britain was blockading the German coast aswell (but not as violently).But when the US government discovered that the Germans were brokering an alliance with the Mexicans, offering to assist them in claiming back territory it had previously lost to the US, that was the decisive tipping point for the American public who began to call for war.
unrestricted trade
When war began in 1914, the U.S. decided to remain neutral. However they entered the war in 1917 mainly because the German ambassador announced the continuation of submarine warfare, and ended diplomatic relations with the U.S. And also because a foreign minister, in an attempt to eliminate the threat of American involvement in Europe, tried to provoke Mexico and Japan into attacking the U.S., a message containing the minister's intent was decoded by the British and sent to the U.S. Because of these two reasons President Wilson asked Congress for permission to go to war.
The Germans were tring to conquer France. The Allies were trying to stop them. Both sides just kept on going North, making trenches to stop the other side, until both sides reached the sea.