Outside Resources:
Purdue OWL: A wonderful website offered by Purdue University which has articles on APA and MLA citation as well as dozens of others discussing the mechanics and process of writing. I am not aware of any other online resource which collects so much knowledge.
Dictionary.com: Most of you probably do not have a physical dictionary anymore. If you do, it could never contain as many words as an online dictionary due to simple space constraints. There are certainly more academic dictionaries available, even online, but this is an amazing general-use resource. It provides understandable definitions and also contains a thesaurus tool.
The Elements of Style: The first version of this book first appeared more than one hundred years ago, but it remains an invaluable guide to how to write. I consider this the single most valuable resource for learning writing basics available to the public. It is less than one hundred pages but provides advise on grammar, usage, and style.
Kate Turabian's A Manual for Writers: Another writing guide which I consider near-invaluable. It lacks with brevity and humor of Elements of Style but makes up for it by providing an amazing level of depth as well as a full guide to writing and citation in the Chicago Style. It also contains a guide to editing and revision. This may be the best single-volume resource for academic writing and it will drastically improve even your non-academic writing.
The Avalon Project: A Project of the Lillian Goldman Law School Library at Yale Law School which is a brilliant resource for historical documents from throughout time. The earliest documents date from 4000 BCE while the newest currently date to 2003.
Library of Congress Timeline: A timeline with basic information and events from 1764 to 1788. It also contains a variety of historical documents relevant to the events.
Outside Video Resources
Forgotten Weapons: A repository for video, photo, and documentary evidence concerning firearms and firearms design from the eighteenth century to present. The owner performs original research and explains the history, function, and operation of weapons throughout history. If you are interested in firearms history, this is the resource for you.
C&Rsenal: A YouTube channel which specializes in deeply-researched and detailed firearm history. Currently, the channel is focused on the weapons used during the First World War and percussion revolvers. They go into far more depth on these firearms than Forgotten Weapons and also focus on testing and adoption to a greater degree. This is a resource for a true enthusiast.
The Great War: A video series which follows the course of the First World War week by week, explaining the political, strategic, and technological factors which influenced the war and its aftermath. The series is now complete so it is a wonderful resource to learn about the war using multimedia.
World War Two: A video series which follows the course of the Second World War week by week, explaining the political, strategic, and technological factors which influenced the war. This series was created by the same people who created The Great War and is still actively producing content.
Schola Gladiatoria: An educational channel about swords, polearms, and other bladed weapons. The channel’s owner is a professional collector and experienced martial artist who runs a Historical European Martial Arts (HEMA) club in the United Kingdom. He has training in archaeology and regularly consults historical documents. This is an amazing resource to cut through the myths and misinformation so prevalent in discussions about bladed weapons.