Databases for History Research
Issues and Controversies in History
This comprehensive reference database covers every region of the world from antiquity to the present. It delivers dynamic, concise, and balanced coverage of a broad range of topics, from slavery, empire, and revolution to race, gender, economy, and disease, all over the globe.
U.S. History In Context
Contextual information on hundreds of the most significant people, events and topics in U.S. History. Content includes reference works, millions of news and periodical articles, and more than 5,000 rare and vital primary source documents that range from slave journals to presidential papers.
Biography in Context
Biography In Context is built on a foundation of more than 650,000 biographical entries covering international figures from all time periods and areas of study.
JSTOR
Leading resource for the humanities. Search for scholarly journals, primary sources, and books.
Ancient and Medieval History Online
Ancient and Medieval History Online provides thorough coverage of world history from prehistory through the 1500s, with special Topic Centers on key civilizations and regions, including the ancient Near East, Egypt, Greece, and Rome; ancient and medieval Africa, Asia, and the Americas; and medieval Europe and the Islamic World.
World History In Context
World History In Context reaches back to the ancient world — and forward to today's headlines — to deliver a chronicle of the great cultures and societies that have formed the history of the human race. Rare primary sources, reliable reference and multi-media content put this vast topic into context for students.
Age: Not Just a Number
In Historical Research, it is often helpful to include the timeframe or epoch you are studying in your searches. It can be difficult to define the time period you are looking for without using numbers (years, dates); this guide may be useful to you. 
(Even though this infographic is based on Copper, it still illustrates the historical time periods well!)