This paper provides an assessment of indicators associated with Unidentified Anomalous Phenomena (UAP) reports included in the SCU Pattern Recognition Study (Hancock et al., 2023a). The Pattern Recognition study analyzed UAP incidents geographically proximal to US military installations between 1945 and 1975. A set of 590 comprehensively documented UAP reports from this period were collected from select sources, including Project Blue Book. Study sites included: 1) atomic materials production, 2) atomic weapons assembly, 3) atomic weapons stockpiles, 4) atomic weapons deployment, and 5) rocket/missile testing and development. The Pattern Recognition Study concluded that intelligent and focused activity was associated with UAP at atomic facilities to a greater degree than conventional non-atomic military facilities. Further study of the UAP activity frequency, type and pattern indicated the need to assess possible intentions relating to information collection, obstruction of military activities, and aggressive engagement. An additional 284 incidents were examined based on relevant UAP activity, for a total of 874 incidents. A list of indicators was created and mapped to four major scenarios for assessment. Based on the analysis of indications for UAP incidents included for this study, an Atomic Weapons Survey was indicated as the most likely scenario. The less likely scenarios were General Military Survey, Atomic Warfare Prevention and Military Aggression respectively.