The Nafziger Orders of Battle collection

From the finding aid, updated in 2012:

"This collection was provided through the generous donation of George Nafziger to the Combined Arms Research Library. The Nafziger Orders Of Battle Collection contains a compilation of 7985 individual orders of battle from 1600 to 1945. It began with George Nafziger’s interest in Napoleonic Wars, and steadily grew to other areas because of the gaming public's interest in these highly detailed historical orders of battle. Sources range from published works to actual archival documents, which represent the largest single source. Nearly all orders of battle break down to the regimental level. The availability of strength figures and artillery equipment varies from period to period."

I've known about this collection for a while and was using it again this morning to look at British Army stations in the 1890s. Most of these transcripts are taken from lists published in The Army & Navy Gazette which itself can be accessed via the British Newspaper Archive and Findmypast.  The Nafziger list is useful though becuase the index and the individual PDFs are easily searchable and acan also be downloaded.

The Nafziger finding aid is here. Click on the individual links within this document to download the lists.