Assignments.php

public function getSalesmanTerritory()
{
   return 
      $this->salesman->fname .
      ' ' .
      $this->salesman->lname .
      ' ' .
      $this->territory->name;
}

public function salesman()
{
   return this->belongsTo(Salesman::class);
}

public function territory()
{
   return this->belongsTo(Territory::class);
}