Robust knowledge is knowledge that has stood the test of time and survived constant criticism. When a piece of knowledge is examined for its truthfulness, critics make a consensus over whether it's correct or not. The knowledge becomes robust if a consensus is reached on its truthfulness and if it survives criticism from different sides and angles. This is difficult to apply to history because those who make history usually have a different perception of what happened. What was an assassination in the mind of one country, is a move of fighting for freedom in another country. That's why a consensus needs to be made on a global scale regarding historical developments and it is done through the academia where people write papers and critics from all over the world critique them to eventually reach an idea of truthful global history.
A dictator is the kind of leader who has total control over a country and is unrestrained by law. The word of the dictator becomes the law and he is the person that cannot be challenged by any person living under his rule. Hitler is a great example of a German dictator. I hope the answer comes to your help.
conflict ended with the country split into a Communist North and a pro-Western South is the answer.