Streets, neighborhoods, playgrounds: its pickup soccer, formalized. But in organized form, it has taken the United Kingdom by storm and is quickly making inroads into the U.S. As far as small-sided games, soccer nations such as the United Kingdom, Holland, Germany , France , Brazil , and Argentina have long incorporated small sided games into their youth development programs and professional training because of the strong benefit to player development. The United States Soccer Federation has also recently begun to aggressively endorsing the use of small sided games into youth leagues and training.