The Eastern Association is best known for its performance at the battle of Marston Moor and the rise of Oliver Cromwell, but it was so much more.

Laurence Spring studied at the Universities of London and Aberystwyth. He is also a qualified archivist, and has worked for many years at the Surrey History Centre. He has researched the early seventeenth century for many years and has written on various aspects of the English Civil War. He has also written many books on the Russian Army during the Napoleonic Wars as well as several articles for the "Surrey in the Great War" website. Since he has an archival background he prefers to search through archives looking for various interesting facts for his books, rather than relying on printed sources, which give a vivid insight to the subject and are not mentioned in secondary sources. Using this method, he has found evidence that contradicts the established 'facts' on many subjects.