who were the first terrorists of teh modern age, just wondering which groups claimed responsibility?

The Fenians in Ireland from the second half of the 19th century.

For those whom prefer to see them as nationalist freedom fighters,then it would be the Anarchists of the late 19th and early 20th centuries,in particular those who carried out propaganda of the Deed - which were terrorist attacks aimed against the Establishment.

If you are referring to the modern age, a lot of the other answers on here are incorrect as they are referring to terrorism activity prior to modern terrorism.

Some of the earliest accounts of modern day terrorism occur within Russia.

The Narodnaya Volya, or People's Will, a group founded in Russia in 1978 was a revolutionary anarchist group. They wanted to spark a revolt that would overthrow the Russian Tsars, and in doing so, they killed several prominent politicians, as well as the Tsar Alexander II. They, of course, like most terrorist groups, failed to spark a revolution.

There was also a lot of terroristic activity that occured at the hands of the Irish Republican Army during the Troubles in Ireland. This group attacked over 300 police stations, publicly killed police officers, burned docks, (Bloody Sunday)

Depending on where in the world you wish to look, terrorism began springing up throughout the world in the late 19th early 20th centuries.

At least in part you might want to consider the evolution of terrorism in the modern age - these things just didn't happen or come together instantly. I do agree with some here that it would help if we knew just "what" you mean by "the modern age". I am going to use my interpretation and apply it to your question here. Here are some thoughts on works that ultimately led to 20th and 21st century "terrorism". Keep in mind that following the concluision of the First World War there was a paradigm that dominated military thinking, practice, and pre-war operations before the beginning of the Second World War. This too is where matters begin to expand again and further beyond anyones true ability to perceive the radical experiences of terror.

a) Andreas Emmerich in his work "The Partisan in War" (1789), for instance, drew upon his experiences during the American Revolutionary War and mentioned guerrilla tactics (particularly surprise attacks), but only outlined their value when employed by light infantry battalions during conventional warfare.

b) Major General Georg Wilhelm von Valentini in his "Treatise on Small Wars and the use of Light Troops" (1799).

c) General Denis Davidov in his" Essay on the Theory of Partisan Warfare" (1821). This work by this acclaimed Russian is one of my personal favorites - he was nothing short of brilliant.

d) Erskine Caldwell’s in "All Night Long: A Novel of Guerilla Warfare in Russia" (1942) is a good first thorough account of geurilla tactics in the 20th century that was also an insight for use by the allies during the Second World War. This book and thought sort allows us to make the "leap of faith" from the 19th century into more collective "modern times".

Now, even with all this in mind and with other good answers here consider the French Communards blowing up of cafe's and other public places in 1871. French on French for political gains. If you can hunker down the "modern times" phrase specifically then your answer is laying within one of these here that answered the question.

Best of luck.

Depends what you mean by the Modern Age - and how you define terrorists.

Certainly lots of Fenian activity in early 20th century - but there were all sorts of insurrections/demonstrations /protests/incidents in and around the Empire from time to time.

As we get the term from the Reign of Terror in the French Revolution - probably there would be as good a place to start as any. But some of Nero's activities could doubtless be classed as terrorism.

Considering it brings extra nefarious validity to their insane manifesto and murderous / suicidal agendas. It appears we are competent to apprehend one of the most agencies individuals and some leaders,but these companies are like cockroaches.They cover in all of the holes and cracks,they feed on feelings and beliefs.They are mind washed to think there may be glory in dying a martyr for their rationale,than to are living a ordinary existence.

It depends on how you define "the modern age" and differentiate between "terrorist" and "revolutionary fighter". I am not aware of any group which claimed to be the first (or which other people blamed as being the first).

Certainly terrorism for political (as opposed to military) ends and directed at civilians (as opposed to military/government targets) developed after WW2 as many countries fought to gain independence from their colonial masters - EOKA in Cyprus, Irgun/Stern gang in Palestine, MauMau in Kenya, Viet Minh in French Indochina, Communist Terrorists in Malaya, etc.

An early group would be American separatists before the War of Independence.