SAN FRANCISCO–(BUSINESS WIRE)–Vanguard Defense, a data observability company helping defense contractors and government vendors organize and secure the unstructured data used to train and operate AI models, today announced the close of its $5 million seed round led by security technology venture firm First In. Vanguard Defense is focused on building a platform that brings structure and an added layer of security to the vast volumes of unstructured data that power foundational models and other