Mounted police and dog units are set to patrol south London ahead of the Millwall versus West Ham football match. Authorities have raised concerns about potential fan violence, prompting a large-scale public order operation. The deployment includes more than 400 officers in riot gear, with a focus on high-risk areas near the stadium. Local authorities have warned of the need for heightened security due to past incidents involving football fans. The operation aims to prevent disorder and ensure the safety of all attendees. The match is expected to draw a large crowd, increasing the pressure on law enforcement to manage any tensions. Officials have not issued specific details about the expected level of unrest but have emphasized preparedness. The situation remains under close monitoring as the event approaches.