Why did the way WWII ended in the Pacific change how wars are fought in the present day?

In order to
understand the answer to this, we first have to remember how the war in the Pacific ended.  The
war in the Pacific ended, in essence, with the dropping of the atomic bombs on Hiroshima and
Nagasaki.  This changed the way in which wars are fought today because it ushered in the age of
nuclear weapons.

Nuclear weapons have changed the way in...