SIFT completed the final field exercise for DARPA's OFFSET (OFFensive Swarm-Enabled Tactics) program in November 2021, at Ft Campbell, TN.  Throughout the program's four-year history, SIFT contributed to Raytheon BBN Technologies' team by designing, implementing, refining and testing command and control approaches in a virtual reality user interface for managing swarms of hundreds of real world heterogeneous unmanned vehicles.  Our I3 application (Immersive Interaction Interface) received live telemetry from platforms within the scenario, created tactic, platform, swarm, and mission plan interactive visualizations to facilitate operator SA, and executed tasking of the physical platforms at varying levels of specificity, aggregation, and autonomy.