I was trying to theorise in my head what would happen if a WW3 broke out to me personally. I work for a huge global company and I regularly work with offices in north America and Asia even though I'm based elsewhere, what if our countries went to war, how would we interact as a company, would business cease etc So I was wondering if there are any examples from history at all or i guess there just weren't huge corporations back then like there are now?
Before WW2 IBM America owned Hollerith Germany. Both made tabulation machines using a common PunchCard technology standard that enabled countries to perform censuses on their population (race, age, sex, religion, family, address).
The same tech that enabled Germany to find and ship Jews to Concentration camps in their territories, enabled America to find and ship Japanese-Americans to Internment camps.
As well as allowing both branches to do their patriotic best to manage their own homeland's transport and logistics
When the war broke out, German profits were kept inside Germany, however the German branch reported to IBM Switzerland that in turn reported back to IBM New York.
After the war the IBM engineers embedded in the US military were able to reclaim "their" Hollerith machines from the captured concentration camps, load them up with German census data and find Nazi personnel in the wider population.
For a more information you may want to read