Exactly. The best defense after attack itself is defense-in-depth.

I've already mentioned Japanese defense and fortresses in the Pacific but I very idiotically forgot about marshal Kesselring's master defense of Italy.

Using mountains, river, hills, towns, blowing up and mining everything, along with defending strategic spots and ocassionally counter-attacking. Kesselring was definately one of the greatest geniouses of defense in warfare!

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"War is less costly than servitude, the choice is always between Verdun and Dachau." - Jean Dutourd, French veteran of both world wars

"A mon fils: depuis que tes yeux sont fermes les miens n’ont cessé de pleurir." - Mère française, Verdun