Answer:
Churchill said victory because that was his aim and goal in waging the war. He was all out to get victory.
Step-by-step explanation:
From the last paragraph, we discover that Churchill stated that their aim is to get victory.
From the excerpt, he stated: "You ask: what is our aim? I can answer in one word: it is victory, victory at all costs, victory in spite of terror, victory, however long and hard the road may be; for without victory, there is no survival".
He saw victory as the only means of survival. So, they were all out to get victory in spite of the war and terror.