Simplify the following text for a Grade 14 native English-speaking person.
Original: A series of hard fought convoy battles ( Second Battle of Sirte in March , Operations Harpoon and Vigorous in June , and Operation Pedestal in August ) were victories for the Axis but ensured Malta 's survival , until the Allies regained the advantage in November 1942 .
Simplified: A series of hard fought convoy battles ( Second Battle of Sirte in March , Operations Harpoon and Vigorous in June , and Operation Pedestal in August ) ensured Malta 's survival , until the Allies regained the advantage in November 1942 .