The Death of Oliver Cromwell - Lord Protector of England
- Scans of The Intelligencer, September 2-9, 1658, containing an account of his death.
- http://www.adelpha.com/~davidco/History/cromwell-1.htm

The Execution of King Charles I
- Scans of The Intelligencer, January - February, 1648, containing an account of the trial and execution of the king.
- http://www.adelpha.com/~davidco/History/charles1.htm

Oliver Cromwell - Letter to his Brother-in-Law after the Battle of Marston Moor
- Correspondence on the death of their sons.
- http://www.fordham.edu/halsall/mod/1644cromwell-marston.html

The Pike and Shot Society
- International organization that promotes interest in the warfare of the Early Modern Period, 1400 - 1721.
- http://www.pikeandshotsociety.org/

17th Century Reenacting & Living History Resources
- 17th century, Thirty Years War and English Civil War pamphlets, news sheets and other documents in full text format.
- http://www.lukehistory.com/resources/

Geometry of War
- Online catalogue for an exhibit at the Museum of the History of Science, Cambridge, England relating to artillery and fortification during the 16th and 17th centuries. Photographs of range-finding and like instruments, prints from contemporary books, cata
- http://www.mhs.ox.ac.uk/geometry/content.htm