Authorities are concerned that Wednesday's World Cup semi-final clash between England and old rivals Argentina in Atlanta could spark unrest both inside and outside the 75,000-seat stadium.
Police are on high alert for the semi-final showdown, where limited segregation of fan bases is expected. The two nations will face off at the Mercedes-Benz Stadium in downtown Atlanta, which boasts a capacity of 75,000.
Law enforcement officials are well aware of the historical context surrounding the match. England and Argentina share a rich and often contentious history, both on and off the pitch – from Diego Maradona's infamous "Hand of God" goal at the 1986 World Cup to the Falklands War, which Argentine players referenced in chants after their victory over Switzerland on Sunday.
The two teams haven't met in over two decades. While tickets purchased through their respective national federations are allocated to specific sections, those sold by FIFA allow rival fans to sit alongside each other.
Police are preparing for a near-even split of supporters, as both sides have enjoyed significant backing throughout the tournament, thanks to both expatriates and travelling fans from their home countries.
English supporters have been praised for their conduct, with only four arrests made in Miami on Saturday night when the Three Lions defeated Norway 2-1 after extra time to reach the semi-finals for only the second time since 1990.
The Atlanta Police Department released a statement saying: "As Atlanta prepares to host the upcoming World Cup semi-final match and welcomes an increased number of residents and visitors, the Atlanta Police Department has heightened its public safety and security measures citywide.
Additional personnel and resources have already been deployed and will continue to be strategically allocated in and around event venues, entertainment districts, and other high-traffic areas to ensure a safe and enjoyable experience for all. These proactive measures are designed to protect the public, deter criminal activity, and provide residents and visitors with the opportunity to safely enjoy this historic event."
When England played their last match in Atlanta in the round of 16, their fans significantly outnumbered those of DR Congo. However, Argentina is expected to bring thousands of their supporters in their bid to win a second consecutive World Cup.