Minecraft wiki entry for Patrol, associated text: In Bedrock Edition, when one of the patrol members is attacked, it alerts nearby patrol members within 10 blocks to attack the same target as a swarm. The attacker can be any mob and doesn't need to be a player, and the distance between attacker and patrol can be up to 64 blocks away from alerted patrol members. This means that a llama who accidently spits on a patrol member can provoke all of the members of the patrol at once. Vindicator patrol members target and attack the player without prior provocation.