The DD Form 1391 is the primary document used by the Department of Defense to plan, justify, and secure funding for military construction projects. Managed through the USACE Processor System, a complete submittal package typically includes project descriptions, detailed cost estimates, and justification data, which are often bundled in compressed files. To open a "pack 1391.rar" file, specialized extraction software is required. More information on this system is available from the USACE . DD Form 1391 Processor System