Catholics and Protestants
None anymore but in the 1960s-1990s there was conflict between the protestants and Catholics of the land because the Catholics wanted an united Ireland and the protestants wanted Northern Ireland to stay under British rule . no fighting anymore despite rumours from other sources
As counter-intuitive as it might be, the two groups involved in the Arab-Israeli Conflict are the Arabs and the Israelis.
There are several groups involved in the middle east conflict. There are Shia and Sunni Muslims involved. The United States is also involved, as well as terrorist groups like ISIS and Al Qaeda.
There is no conflict between the north and the republic. Basically Ireland was under british rule and events in the years after the 1916 rising led to The British 'giving back' Ireland, ie creating a republic. Although, 6 counties in Ulster (out of 9) were kept under british rule, and are now Northern Ireland. Within northern Ireland there are nationalists, those who want the north to join the republic, and unionists, those who want to remain under british rule. Therefore the conflict is generally confined within the north..
The main division of conflict is between the Republicans (Nationalists), which are associated with Catholics, and the Loyalists (Unionists), which are associated with Protestants. However in recent years the Loyalists have become less active in conflict and any violence has developed into usually the Republicans targeting the security forces (Police/Army) in Northern Ireland.
Up until 91 years ago all of Ireland was ruled by Britain and wanted freedom from UK rule, (With the exception of Protestant groups in Northern Ireland) The south obtained freedom but Northern Ireland has not - there are still some groups in Northern Ireland that want freedom from the UK
The Catholics and the Protestants
There are 4 groups in the UK- Northern Ireland, Scotland, England, and Wales.
The loyalists (unionists) and the Nationalists.
The troubles refer to the conflict between Republicans and Loyalists in Northern Ireland mostly between 1969 and 1998. Republicans wanted Northern Ireland to be free from Britain while Loyalists did not want that. Terrorist activities between the two sides resulted, and included some other groups such as army and police. Over 3000 people died as a result.
Loyalists, and also unionists, refers to people in Northern Ireland that want Northern Ireland to remain part of the United Kingdom. They are "loyal" to the queen and want to remain in the "union". Loyalists are generally more associated with the more radical groups that have been involved in terrorism to further their cause.
Alfaghistan is currently involved in an armed conflict with rebel groups within its borders. This conflict is a result of political, ethnic, or religious tensions, and has led to violence and instability in the region.