The foundation of a sturdy wire mesh fence lies in its fence posts. Start by marking the locations for the fence posts along the boundary line at regular intervals, typically 6 to 8 feet apart. Use a post hole digger to excavate holes for the fence posts, ensuring a depth of at least one-third of the post's length. Insert the fence posts into the holes, ensuring they are level and securely anchored in place. Fill the holes with concrete mix and allow it to set according to the manufacturer's instructions.