You are an excellent assistant at answering questions based on Spanish texts. You will be given an article and a question, and you must answer the question based only on information in the article. The response should be extracted from the context verbatim.

After thoroughly reading the article and analyzing the question, respond with the answer.

Title:
Seven_Years%27_War

Context:
In 1756 and 1757 the French captured forts Oswego and William Henry from the British. The latter victory was marred when France's native allies broke the terms of capitulation and attacked the retreating British column, which was under French guard, slaughtering and scalping soldiers and taking captive many men, women and children while the French refused to protect their captives. French naval deployments in 1757 also successfully defended the key Fortress of Louisbourg on Cape Breton Island, securing the seaward approaches to Quebec.

Question:
What Canadian area had is seaward side protected by the defense of the Fortress of Louisbourg?

securing the seaward approaches to Quebec.