Front and back.
Now, I digress from the instructions. In the Brown-Reinsel article, she directs the knitter to cast on for the body underarm once the sleeves are deep enough. I've put the body pieces on hold, and plan to knit the sleeves next. Firs, two 1/2 inches back and forth to provide an extra 5 inches on each side for the underarm area. Then join the sleeve and continue in the round. Then, I can PICK UP those stiches off of the sleeve edge, and continue down the body. Look ma - no seam.