Net-centric command, control, and communications (C3) systems provide vital information to military commanders and increase their situation awareness (SA) of the battlespace. However, the amount of information presented and the dynamic nature of that information often makes it difficult to focus attention appropriately. Immediate feedback, in the form of automated alerts, can help direct the user's attention to important events and can be a valuable tool both for training and during military operations. Research in other areas (aviation) has shown under certain conditions automated alerts improve SA, but under other conditions alerts can interfere with SA. Theory suggests workload may be a factor. The present research sought to determine how automated feedback and workload affects SA for users of net-centric C3 Systems. In the experiment, participants viewed a laptop computer showing a simulated C3 display running a typical combat scenario, and were asked to look for and remember key events. A software application called SHIELD (System to Help Implement and Empower Leader Decisions) provided automated alerts of potentially hazardous events, such as violating unit boundaries or approaching minefields. Each participant completed two trials, one in the experimental condition and one in the control condition, with the order assigned randomly. In the experimental condition, subjects were alerted to certain situations. In the control condition, no alerts were provided. The participant's SA and workload were measured periodically during each trial. SA and workload scores were compared across the experimental and control conditions. Results showed that immediate feedback increased SA for participants with no military experience, but not for Soldiers.