If Australian PMs counts, John Curtin. Took over in WW2 after Menzies, died in office before it was finished.
As I understand it, Michael Savage, New Zealand Prime Minister in '39, declared war on Germany from his bed, while dying from cancer, and that he'd delayed seeking treatment for it so he could win the previous election, which is noteworthy as well.
As I understand it, Michael Savage, New Zealand Prime Minister in '39, declared war on Germany from his bed, while dying from cancer, and that he'd delayed seeking treatment for it so he could win the previous election, which is noteworthy as well.