This is a timeline of incidents in 1973 that have been labelled as "terrorism

Terrorism

Terrorism is the systematic use of terror, especially as a means of coercion. In the international community, however, terrorism has no universally agreed, legally binding, criminal law definition...

" and are not believed to have been carried out by a government

Government

Government refers to the legislators, administrators, and arbitrators in the administrative bureaucracy who control a state at a given time, and to the system of government by which they are organized...

 or its forces (see state terrorism

State terrorism

State terrorism may refer to acts of terrorism conducted by a state against a foreign state or people. It can also refer to acts of violence by a state against its own people.-Definition:...

 and state-sponsored terrorism

State-sponsored terrorism

State-sponsored terrorism is a term used to describe terrorism sponsored by nation-states. As with terrorism, the precise definition, and the identification of particular examples, are subjects of heated political dispute...

).
, January 7: After shooting a police officer a week earlier, Mark Essex

Mark Essex

Mark James Robert Essex killed 9 people, including 5 police officers, and wounded 13 others in New Orleans on December 31, 1972 and January 7, 1973.-Background:Mark James Robert Essex was born in Emporia, Kansas...

, a former Black Panther

Black panther

A black panther is typically a melanistic color variant of any of several species of larger cat. Wild black panthers in Latin America are black jaguars , in Asia and Africa they are black leopards , and in North America they may be black jaguars or possibly black cougars A black panther is...

 party member, shot nineteen people (ten of them police officers) in retaliation for police killings at a Howard Johnsons hotel in New Orleans. In addition, he also set fires in the hotel before being killed by police.: A New York City

New York City

New York is the most populous city in the United States and the center of the New York Metropolitan Area, one of the most populous metropolitan areas in the world. New York exerts a significant impact upon global commerce, finance, media, art, fashion, research, technology, education, and...

 transit detective is killed and ten law enforcement personnel are shot, four by machine gun, during the year mostly in and around New York City

New York City

New York is the most populous city in the United States and the center of the New York Metropolitan Area, one of the most populous metropolitan areas in the world. New York exerts a significant impact upon global commerce, finance, media, art, fashion, research, technology, education, and...

 by the Black Liberation Army

Black Liberation Army

The Black Liberation Army was an underground, black nationalist-Marxist militant organization that operated in the United States from 1970 to 1981...

. Also two members of that organization are arrested with a car full of explosives. In the next few years there are a number of violent incidents involving this organization but they are more criminal in nature., March 1: Black September

Black September (group)

The Black September Organization was a Palestinian paramilitary group, founded in 1970. It was responsible for the kidnapping and murder of eleven Israeli athletes and officials, and fatal shooting of a West German policeman, during the 1972 Summer Olympics in Munich, their most publicized event...

 takes ten hostages (five of them diplomats) at the Saudi Arabian embassy in Khartoum

Khartoum

Khartoum is the capital and largest city of Sudan and of Khartoum State. It is located at the confluence of the White Nile flowing north from Lake Victoria, and the Blue Nile flowing west from Ethiopia. The location where the two Niles meet is known as "al-Mogran"...

. Three western diplomats are killed., April 16: Primavalle Fire

Primavalle Fire

The Primavalle Fire was an arson which occurred in Rome on April 16, 1973, and which caused the death of two youngsters, children of neo-fascist MSI member Mario Mattei....

, 3 activists of Potere Operaio

Potere Operaio

Potere Operaio was a radical left-wing Italian political group, active between 1968 and 1973. Among the group's leaders were Antonio Negri, Franco Piperno, Oreste Scalzone and Valerio Morucci, who led its clandestine...

 burned the house of a militant of the Italian Social Movement

Italian Social Movement

The Italian Social Movement , and later the Italian Social Movement–National Right , was a neo-fascist and post-fascist political party in Italy. Formed in 1946 by supporters of former Italian dictator Benito Mussolini, the party became the fourth largest party in Italy by the early 1960s...

 and killed his two sons., May 17: Gianfranco Bertoli, an anarchist activist, supporter of Max Stirner

Max Stirner

Johann Kaspar Schmidt , better known as Max Stirner , was a German philosopher, who ranks as one of the literary fathers of nihilism, existentialism, post-modernism and anarchism, especially of individualist anarchism...

, attacked the Police headquarters in Milan, Italy with a Hand grenade

Hand grenade

A hand grenade is any small bomb that can be thrown by hand. Hand grenades are classified into three categories, explosive grenades, chemical and gas grenades. Explosive grenades are the most commonly used in modern warfare, and are designed to detonate after impact or after a set amount of time...

  during a commemorative ceremony with the Italian Prime Minister Mariano Rumor

Mariano Rumor

Mariano Rumor was an Italian politician, a member of the Democrazia Cristiana and the 40th Prime Minister of Italy.He was born in Vicenza, Veneto...

. , May 18: An Aeroflot

Aeroflot

OJSC AeroflotRussian Airlines , commonly known as Aeroflot , is the flag carrier and largest airline of the Russian Federation, based on passengers carried per year...

 Tupolev Tu-104B

Tupolev Tu-104

The Tupolev Tu-104 was a twin-engined medium-range turbojet-powered Soviet airliner and the world's first successful jet airliner...

 flying from Irkutsk Airport to Chita Airport explodes in flight after a passenger detonated a bomb when refused passage to China. The plane crashed east of Lake Baikal

Lake Baikal

Lake Baikal is the world's oldest at 30 million years old and deepest lake with an average depth of 744.4 metres.Located in the south of the Russian region of Siberia, between Irkutsk Oblast to the northwest and the Buryat Republic to the southeast, it is the most voluminous freshwater lake in the...

, with all 82 passengers killed., May 17: The IRA

Provisional Irish Republican Army

The Provisional Irish Republican Army is an Irish republican paramilitary organisation whose aim was to remove Northern Ireland from the United Kingdom and bring about a socialist republic within a united Ireland by force of arms and political persuasion...

 kills 5 British soldiers in a roadside bomb attack in Tullyvallen, Northern Ireland

Northern Ireland

Northern Ireland is one of the four countries of the United Kingdom. Situated in the north-east of the island of Ireland, it shares a border with the Republic of Ireland to the south and west...

., September 1: A man blows himself up inside Lenin Mausoleum on Moscow

Moscow

Moscow is the capital, the most populous city, and the most populous federal subject of Russia. The city is a major political, economic, cultural, scientific, religious, financial, educational, and transportation centre of Russia and the continent...

's Red Square

Red Square

Red Square is a city square in Moscow, Russia. The square separates the Kremlin, the former royal citadel and currently the official residence of the President of Russia, from a historic merchant quarter known as Kitai-gorod...

. Two women standing next to him also died., September 10: The IRA

Provisional Irish Republican Army

The Provisional Irish Republican Army is an Irish republican paramilitary organisation whose aim was to remove Northern Ireland from the United Kingdom and bring about a socialist republic within a united Ireland by force of arms and political persuasion...

 set off bombs at London's King's Cross Station

King's Cross station

King's Cross station may refer to::* London King's Cross railway station in London, England** King's Cross St. Pancras tube station for London Underground lines.** King's Cross Thameslink, a disused railway station in London, England...

 and Euston Station

Euston station

Euston station may refer to one of the following stations in London, United Kingdom:*Euston railway station, a major terminus for trains to the West Midlands, the North West, North Wales and part of Scotland...

, injuring 21 people., September 28: Chopin-Express: Two Arab

Arab

Arab people, also known as Arabs , are a panethnicity primarily living in the Arab world, which is located in Western Asia and North Africa. They are identified as such on one or more of genealogical, linguistic, or cultural grounds, with tribal affiliations, and intra-tribal relationships playing...

 terrorists hijack the Chopin-Express from Moscow

Moscow

Moscow is the capital, the most populous city, and the most populous federal subject of Russia. The city is a major political, economic, cultural, scientific, religious, financial, educational, and transportation centre of Russia and the continent...

 to Vienna

Vienna

Vienna is the capital and largest city of the Republic of Austria and one of the nine states of Austria. Vienna is Austria's primary city, with a population of about 1.723 million , and is by far the largest city in Austria, as well as its cultural, economic, and political centre...

 at the East-West border in Marchegg

Marchegg

Marchegg is a town in the district of Gänserndorf in the Austrian state of Lower Austria near the Slovak border...

. The train is often used by Jewish exilants from the USSR. The terrorists demand the closure of an Austrian transit camp for Jews on their way to Israel

Israel

The State of Israel is a parliamentary republic located in the Middle East, along the eastern shore of the Mediterranean Sea...

. Chancellor Bruno Kreisky

Bruno Kreisky

Bruno Kreisky was an Austrian politician who served as Foreign Minister from 1959 to 1966 and as Chancellor from 1970 to 1983. Aged 72 at the end of his chancellorship, he was the oldest acting Chancellor after World War II....

 (Jewish himself) complies and allows the terrorists to escape to Libya

Libya

Libya is an African country in the Maghreb region of North Africa bordered by the Mediterranean Sea to the north, Egypt to the east, Sudan to the southeast, Chad and Niger to the south, and Algeria and Tunisia to the west....

., December 14: The Algerian consulate in Marseilles was bombed by the anti-Arab Charles Martel Group

Charles Martel Group

The Charles Martel Group was a French far-right anti-Arab terrorist organization which operated in the 1970s and 1980s...

. Four people were killed and another twenty were injured in the bombing., December 17: Pan Am Flight 110

Pan Am Flight 110

On December 17, 1973, Pan Am Flight 110 was scheduled to fly from Leonardo Da Vinci International Airport in Rome to Beirut International Airport in Lebanon and then on to Tehran, Iran...

: 30 passengers were killed when Palestinian guerillas threw phosphorus bombs aboard the aircraft as it prepares for departure., December 20: Prime Minister Admiral Luis Carrero Blanco

Luis Carrero Blanco

Don Luis Carrero Blanco, 1st Duke of Carrero Blanco, Grandee of Spain was a Spanish admiral and long-time confidant of dictator Francisco Franco.- Biography :...

 is assassinated in Madrid

Madrid

Madrid is the capital and largest city of Spain. The population of the city is roughly 3.3 million and the entire population of the Madrid metropolitan area is calculated to be 6.271 million. It is the third largest city in the European Union, after London and Berlin, and its metropolitan...

 by ETA

ETA

ETA , an acronym for Euskadi Ta Askatasuna is an armed Basque nationalist and separatist organization. The group was founded in 1959 and has since evolved from a group promoting traditional Basque culture to a paramilitary group with the goal of gaining independence for the Greater Basque Country...

., December 27: A bomb exploded inside a pub in Belfast

Belfast

Belfast is the capital of and largest city in Northern Ireland. By population, it is the 14th biggest city in the United Kingdom and second biggest on the island of Ireland . It is the seat of the devolved government and legislative Northern Ireland Assembly...

killing 3 people and injured 34.http://news.google.co.uk/newspapers?id=v1osAAAAIBAJ&sjid=Nc0EAAAAIBAJ&pg=4374,5318716&dq=terrorist+bomb+attack&hl=en