In 2006, the United States Joint Forces Command (US JFCOM) Joint Innovation and Experimentation J9 Directorate conducted the Urban Resolve 2015 (UR2015) Experiment. UR 2015 was designed to examine specific solutions to the challenges that will likely confront U.S. military forces in the future urban environment. This "human in the loop" experiment provided training for senior military personnel in decision-making processes by stimulating real-world Command, Control, Communication, Computer, and Intelligence (C4I) systems using an array of simulation technologies. The experiment involved more than 1,000 people at 19 different sites across the United States. It featured extensive use of modeling and simulation (approximately 30 individual simulations including Joint Semi-Automated Forces (JSAF) and OneSAF Testbed (OTBSAF)) running on over 450 computers to create a robust virtual environment that replicated what the urban environment may be like in the future after a major crisis has occurred.

This paper will begin by providing background information on the numerous sites and applications that had to come together to create the UR 2015 federation. Additionally, it will examine the tasks required to integrate these sites and analyze not only the successes, but just as importantly the problem areas encountered. This paper will conclude with guidelines and recommendations for streamlining complex integration efforts when incorporating numerous, diverse simulations distributed over a large number of participating sites.