Military engineer Henry Martyn Robert authored the best known and most widely used book on parliamentary law - Robert's Rules of Order.
Robert served as an engineer in the army from 1867 to 1871. He worked on the defense of Washington, Philadelphia, and the New England Coast during the Civil War and was president of the Board of Engineers from 1895 to 1901. After having difficulty leading a meeting at church one day he declared that he would learn about parliamentary procedure before going back. That resulted in the Pocket Manual of Rules of Order for Deliberative Assemblies loosely based on the procedures used in the US House of Representatives.
Read Robert's Rules of Order.