>Rhodesia has a well developed rail network due to being a former British Colony.
>At this point in history, most of the world is in the process of scrapping their steam locomotive fleets for diesels.
>Rhodesia imports 100% of their oil and petrochemical products.
>Rhodesia realizes that, as soon as they UDI, they will be embargoed by every major power.
>Rhodesia has plentiful native coal.
>Rhodesia goes 'fuck it', sells diesels to South Africa, pulls Beyer-Garratts out of mothball.
>Undergoes major modernization program, rebuilding locomotives with roller bearings, superheaters, front end throttles, economizers, all the bells and whistles.
Rhodesia could have been the savior of modern steam traction, but no, we ruined that too.