What does Claudio mean when he explains to Don Pedro that now you are returned and war-thoughts have left their places vacant in Much Ado About Nothing by William Shakespeare?

When Claudio tells Don Pedro that now he has returned and that his thoughts of war have left behind an emptiness, he means that with Don Pedro's return, the focus shifts from the ongoing war to other matters, such as relationships and personal interactions. Claudio and Don Pedro are soldiers returning home after participating in a war, symbolizing the contrast between the battlefields' seriousness and the social life in Messina, where the play's main plot unfolds.