The 'Communist Detected on American Soil' meme originates from the 2008 video game Fallout 3, specifically spoken by the giant, anti-communist robot Liberty Prime. As Liberty Prime marches through the ruins of Washington D.C., he broadcasts hyper-patriotic slogans and anti-communist propaganda, which players found hilariously over-the-top. The phrase 'Lethal force engaged' often accompanies the line. On the internet, the meme is used ironically to react to anything even slightly socialistic, collective, or simply to express a mock-outraged sense of American nationalism. It has become a staple in gaming communities and political satire circles to highlight absurd levels of Cold War-era zealotry.