The law of war is a component of international law that regulates the conditions for initiating war and the conduct of hostilities. Laws of war define sovereignty and nationhood, states and territories, occupation, and other critical terms of law.
A reprisal is a limited and deliberate violation of international law to punish another sovereign state that has already broken them. Since the 1977 Additional Protocol I to the Geneva Conventions, reprisals in the laws of war are extremely limited, as they commonly breach the rights of non-combatants.
Non-combatant is a term of art in the law of war and international humanitarian law to refer to civilians who are not taking a direct part in hostilities; persons, such as combat medics and military chaplains, who are members of the belligerent armed forces but are protected because of their specific duties ; combatants who are placed hors de combat; and neutral persons, such as peacekeepers, who are not involved in fighting for one of the belligerents involved in a war. This particular status was first recognized under the Geneva Conventions with the First Geneva Convention of 1864.
The Continental Blockade, or Continental System, was a large-scale embargo by French Emperor Napoleon I against the British Empire from 21 November 1806 until 11 April 1814, during the Napoleonic Wars. Napoleon issued the Berlin Decree on 21 November 1806 in response to the naval blockade of the French coasts enacted by the British government on 16 May 1806. The embargo was applied intermittently, ending on 11 April 1814 after Napoleon's first abdication.
Swedish iron ore was an important economic and military factor in the European theatre of World War II, as Sweden was the main contributor of iron ore to Nazi Germany. The average percentages by source of Nazi Germany’s iron ore procurement through 1933–43 by source were: Sweden: 43.0 Domestic production (Germany): 28.2 France: 12.9. Within the German military the Navy was most dependent on Swedish steel as an absolute necessity to the German war effort, according to their grand admiral. It has also been argued that the Swedish export helped prolong the war.
Unrestricted submarine warfare is a type of naval warfare in which submarines sink merchant ships such as freighters and tankers without warning. The use of unrestricted submarine warfare has had significant impacts on international relations in regards to both the First World War and the Second World War. Its history has been dominated by German decision making.
The Paris Declaration respecting Maritime Law of 16 April 1856 was an international multilateral treaty agreed to by the warring parties in the Crimean War gathered at the Congress at Paris after the peace treaty of Paris had been signed in March 1856. As an important juridical novelty in international law the treaty for the first time created the possibility for nations that were not involved in the establishment of the agreement and did not sign, to become a party by acceding the declaration afterwards. So did altogether 55 nations, which otherwise would have been impossible in such a short period. This represented a large step in the globalisation of international law.
International humanitarian law (IHL), also referred to as the laws of armed conflict, is the law that regulates the conduct of war. It is a branch of international law that seeks to limit the effects of armed conflict by protecting persons who are not participating in hostilities and by restricting and regulating the means and methods of warfare available to combatants.
The London Declaration concerning the Laws of Naval War was a proposed international code of maritime law, especially as it relates to wartime activities, in 1909 at the London Naval Conference by the leading European naval powers, the United States and Japan, after a multinational conference that occurred in 1908 in London. The declaration largely reiterated existing law, but dealt with many controversial points, including blockades, contraband and prize, and showed greater regard to the rights of neutral entities.
Command of the sea is a naval military concept regarding the strength of a particular navy to a specific naval area it controls. A navy has command of the sea when it is so strong that its rivals cannot attack it directly. This dominance may apply to its surrounding waters or may extend far into the oceans, meaning the country has a blue-water navy. It is the naval equivalent of air supremacy.
Visit and Search is the right of a belligerent warship, under certain conditions, to board a neutral merchant ship in order to verify its true character. The term probably refers to a misunderstanding of the French word visite, which in this context simply means search.
Naval warfare in World War I was mainly characterised by blockade. The Allied Powers, with their larger fleets and surrounding position, largely succeeded in their blockade of Germany and the other Central Powers, whilst the efforts of the Central Powers to break that blockade, or to establish an effective counter blockade with submarines and commerce raiders, were eventually unsuccessful. Major fleet actions were extremely rare and proved less decisive.
Naval strategy is the planning and conduct of war at sea, the naval equivalent of military strategy on land.
In admiralty law prizes are equipment, vehicles, vessels, and cargo captured during armed conflict. The most common use of prize in this sense is the capture of an enemy ship and its cargo as a prize of war. In the past, the capturing force would commonly be allotted a share of the worth of the captured prize. Nations often granted letters of marque that would entitle private parties to capture enemy property, usually ships. Once the ship was secured on friendly territory, it would be made the subject of a prize case: an in rem proceeding in which the court determined the status of the condemned property and the manner in which the property was to be disposed of.
The Blockade of Germany, or the Blockade of Europe, occurred from 1914 to 1919. The prolonged naval blockade was conducted by the Allies during and after World War I in an effort to restrict the maritime supply of goods to the Central Powers, which included Germany, Austria-Hungary, and the Ottoman Empire. The blockade is considered one of the key elements in the eventual Allied victory in the war. In December 1918, the German Board of Public Health claimed that 763,000 German civilians had already died from starvation and disease caused by the blockade. An academic study done in 1928 put the death toll at 424,000, with similar or lower numbers given by more recent scholars, noting however complications with the degree of attribution of Spanish flu deaths. Around 100,000 people may have died during the post-armistice continuation of the blockade in 1919. However, it has been pointed out that there was an even slightly larger civilian excess mortality during the war in the United Kingdom, a country that was much less affected by food shortages.
The Confederate privateers were privately owned ships that were authorized by the government of the Confederate States of America to attack the shipping of the United States. Although the appeal was to profit by capturing merchant vessels and seizing their cargoes, the government was most interested in diverting the efforts of the Union Navy away from the blockade of Southern ports, and perhaps to encourage European intervention in the conflict.
The First League of Armed Neutrality was an alliance of European naval powers between 1780 and 1783 which was intended to protect neutral shipping against the British Royal Navy's wartime policy of unlimited search of neutral shipping for French contraband during the American Revolutionary War and Anglo-French War. According to one estimate, 1 in 5 merchant vessels were searched by the Royal Navy under this policy. By September 1778, at least 59 ships had been taken prize – 8 Danish, 16 Swedish and 35 Dutch, as well as others from Prussia. Protests were enormous by every side involved.
The San Remo Manual on International Law Applicable to Armed Conflicts at Sea was adopted in June 1994 by the International Institute of Humanitarian Law after a series of round table discussions held between 1988 and 1994 by diplomats and naval and legal experts. It is "the only comprehensive international instrument that has been drafted on the law of naval warfare since 1913."
The Blockade of Germany (1939–1945), also known as the Economic War, involved operations carried out during World War II by the British Empire and by France in order to restrict the supplies of minerals, fuel, metals, food and textiles needed by Nazi Germany – and later by Fascist Italy – in order to sustain their war efforts. The economic war consisted mainly of a naval blockade, which formed part of the wider Battle of the Atlantic, but also included the bombing of economically important targets and the preclusive buying of war materials from neutral countries in order to prevent their sale to the Axis powers.
The blockade of Yemen refers to a sea, land and air blockade on Yemen which started with the positioning of Saudi Arabian warships in Yemeni waters in 2015 with the Saudi Arabian-led intervention in Yemen. In November 2017, after a Houthi missile heading towards King Khalid International Airport was intercepted, the Saudi-led military coalition stated it would close all sea land and air ports to Yemen, but shortly began reopening them after criticism from the United Nations and over 20 aid groups and some humanitarian supplies were allowed into the country. In March 2021, Saudi Arabia denied the blockade continued, however, UN authorized ships continued to be delayed by Saudi warships.
