Okay, so a long time ago in Ireland, there were different groups of people who had their own beliefs and ways of doing things. But then some very powerful people from another country called England came and said they were in charge.
This made a lot of people in Ireland very upset because they didn't want to follow the English rules and they wanted to keep doing things their own way. But the English were very strong and had a big army, so they made the people in Ireland follow their rules.
Over time, some people in Ireland started to get along with the English and even became friends with them. But others still didn't like the English at all and wanted to fight against them.
There were lots of battles and wars over who should be in charge, and sometimes the Irish people won and sometimes the English people won.
Eventually, the English decided to give some power back to the Irish people and let them have their own government. But they still had to follow some of the English rules and the English were still in charge of some things.
This time in history when the English were in charge of Ireland and there were lots of battles and wars is called Early Modern Ireland from 1536-1691.