Multiple unmanned aerial vehicle (multi-UAV) systems have gained significant attention in applications. such as aerial surveillance and search and rescue missions. With the recent development of state-of-the-art multiagent reinforcement learning (MARL) algorithms. it is possible to train multi-UAV systems in collaborative and competitive environments. https://countryscenesaddleryandpetsuppliers.shop/product-category/7-5-inch-gullet-barrel/