Includes 250 maximalist campaigns from 1945-2006. Data are disaggregated at the annual level, so that researchers can track changes in the campaign over time. Second, each annual observation includes a host of new variables, ranging from the campaign’s observed participation size to the diversity of participation to the opponent’s response to third-part support to the strategic progress of the campaign. A few known coding errors in NAVCO 1.1 were corrected. NAVCO 2.1 supersedes these data; they are included here for archival purposes