De Belli Mundi Secundus World War II DBA Variant

Damond Crump offers a WWII Variant for DBA.

De Bellis Indica DBA Variant For 18th and 19th Century India

De Bellis Indica is a DBA variant for warfare in India in the 18th and 19th Centuries.

American War of Independence DBA Variant

From Paul Potter, a variant of DBA for the American War of Independence.

Horse and Musket DBA Variant

Here’s a Horse and Musket DBA Variant — primarily for Napoleonic and Seven Years War, but since the basic principles of war in that era covered a huge number of conflicts, you could adjust as needed.

DBA Rules for 19th Century

From Vae Victis magazine, a DBA variant for the Napoleonic, Mexican-American, American Civil War and Franco-Prussian conflicts.