10.7910/DVN/DUO7IELyall, JasonJasonLyall0000-0001-9117-7503Dartmouth CollegeHarvard Dataverse2020Social SciencesWar; inequality; conflictLyall, JasonJasonLyallDartmouth College2020-10-262022-02-081042212800876283080777434722483424998969118736006629590611275120012837888510682application/x-stata-syntaxapplication/pdfapplication/pdftext/tab-separated-valuesapplication/vnd.openxmlformats-officedocument.wordprocessingml.documenttype/x-r-syntaxapplication/vnd.openxmlformats-officedocument.spreadsheetml.sheettext/tab-separated-valuestext/tab-separated-valuestext/tab-separated-valuesapplication/vnd.ms-excelapplication/vnd.ms-exceltext/tab-separated-values2.0CC0 1.0Project Mars. This dataset records new data on 229 unique belligerents in 252 conventional wars fought between 1800 and 2011. Project Mars introduces new data about these belligerents, including their level of prewar military inequality, and new measures of battlefield performance, including desertion, defection, and fratricidal violence. The latest version is Version 1.1.Please see related codebook ("Sources, Data, Methods: The Project Mars Codebook") for additional information. Project Mars was made possible by generous support from Yale University's MacMillan Center, Institution for Social and Policy Studies, the Kempf Fund, and the Air Force Office of Scientific Research.