While not exactly Cyberwars, I came across my first internet attack back in 1984 (32 years ago) while working at a Technical Operations Centre in Hampshire. While using the IBM network. It was coming up for Christmas when I received an e-mail from the South African top hardware specialist with an electronic Christmas card as an attachment.
It seemed strange as even though we were on very good terms, we didn't send Christmas cards to each other! I went & saw my Boss & explained my suspicions, when his 'phone rang with an urgent call from Johannesburg with a very panicky Specialist warning me not to open the attachment as they just found out that it was infected!!