Medieval Christians and Muslims were fighting exclusively for deeply held religious beliefs.
Please set a username for yourself.
People will see it as Author Name with your public word lists.
Following the introduction of the comprehensive system in the 1960s in the UK, children in Hong Kong transformed from the old education system to the new.  
These patterns can give a "lift" to your writing. Practice them. Try using two or three different patterns for your introductory paragraph and see which introductory paragraph is best; it's often a delicate matter of tone and of knowing who your audience is. Do not forget, though, that your introductory paragraph should also include a thesis statement to let your reader know what your topic is and what you are going to say about that topic.
Students are told from the first time they receive instruction in English composition that their introductory paragraphs should accomplish two tasks: