Complex sentence: She next transported 75 P-40L Army fighters to Africa, arriving Casablanca on 23 February; then patrolled and trained pilots along the New England coast steaming as far north as Halifax, Nova Scotia.
Split into simpler sentences: She next transported 75 P-40L Army fighters to Africa, arriving at Casablanca on 23 February. Next, she patrolled and trained pilots along the New England coast steaming as far north as Halifax, Nova Scotia.