Isaac, too, was tested - by G-d and man

The Sages said that Yitzchak represents 'gevura', courage and might, but it is Abraham, Moses and Joshua who waged wars. What do they mean?

Isaac, too, was tested - by G-d and man
The Sages said that Yitzchak represents 'gevura', courage and might, but it is Abraham, Moses and Joshua who waged wars. What do they mean?