Okay I know this isn't an answer but you should try and answer some of those on your own cause that is a lot of questions to ask someone to answer.
Sorry if this is offending I really don't mean It to offend you.
Answer:
The resulting split divided the European Christian church into two major branches: the Western Roman Catholic Church and the Eastern Orthodox Church. This split is known as the Great Schism, or sometimes the “East-West Schism” or the “Schism of 1054.”
Explanation:
Terroists, medieval, and confederacy I think. ISIS are not Muslims. They claim they are but Islam is nothing like this. Islam is the religion of peace. Not terrorism.