Create an image depicting a historical parade scene. The foreground should feature a trio of individuals in modern, military-inspired uniforms, each holding a vibrant banner. Replace the traditional hats with sleek helmets. In the background, include a crowd of diverse spectators, some waving flags, under a cloudy sky. The architecture in the background should be contemporary with clean lines, and the cobblestone street should be bustling with movement. Ensure there are no visible brand references or identifiable logos.