Fuchhey....Do you go to university or college here at US? If yes, your library webpage will be the good source for scholarly articles. Buddha itself is a very broad topic. Think about being more specific, like, how he got enlightenment, or why he chose the path of enlightenment, etc.
Other historical topic for which you can easily find articles on your library webpage would be world-war 2, Holocaust, Wright Brothers and the invention of airplane etc.
Please check your library website for reliable articles.