Melbourne is experiencing significant unrest as anti-war protesters gather ahead of the Land Forces Defence Expo, with authorities bracing for large crowds estimated at 25,000. Police have faced confrontations during the protests, including protesters setting fires and hurling horse manure at officers, leading to clashes and the deployment of riot squads. The protests, which began peacefully, escalated after a violent demonstration on Wednesday resulted in acid being sprayed at police and numerous arrests. Deputy Opposition leader Sussan Ley criticized the protests, suggesting that demonstrators 'need to get a job' and expressing concern over police resources being diverted from their primary duties. Victoria Police have been granted special powers to manage the situation, including restrictions on face coverings and searches. The ongoing protests have disrupted traffic and created a tense atmosphere in the city's Central Business District.