Complex sentence: The VMH website, which serves as a repository for veterans' stories, also serves as a research tool for those seeking information on individual veterans; in addition, it features an increasing number of articles about the history of military units based in northeastern Minnesota.
Split into simpler sentences: The VMH website serves as a repository for veterans' stories and is also a research tool for those seeking information on individual veterans. In addition, the site features articles about the history of military units based in northeastern Minnesota.