He is saying that England will endure WW2, even if they are losing in the moment. He is saying that if they do surrender now, England will eventually win.
Prepositions indicate direction, time, location, and spatial relationships, as well as other abstract types of relationships.
Prepositions indicate relationships between other words in a sentence.
Many prepositions tell you where something is or when something happened.
As the name suggests they generally tell position if something. Like, behind, front, on, at etc.
I think the answer should be exodus , because exodus means to leave or get out.