Zombie Squad has members all over North America and members in countries all over the world, including the United States, Canada, UK and South America among others. The success may be due in part to the synergy between two phenomena that have emerged in the new millennium: A resurgence of zombies in pop culture, with hit video games (the "Resident Evil" franchise, "Dead Rising" series, "Left 4 Dead", "Stubbs the Zombie", "House of the Dead" series, etc.), literature ("", "The Walking Dead" franchise, "World War Z", "The Zombie Survival Guide") and films ("28 Days Later", the "Resident Evil" series, the "Dawn of the Dead" remake, "Shaun of the Dead", "Land of the Dead", "Zombieland", etc.) combined with a renewed interest in disaster preparedness in the wake of natural disasters (2004 Tsunami in Indonesia, Hurricane Katrina) and high-profile terrorist attacks (failed millennium plots, 9/11, 3/11, and the 2005 London bombings).