phdepressed
First link is behind a paywall, second link doesn’t have anything about war crimes, third link is an academic paper talking about surrendering germans and how they were often killed by Canadian forces. It notes that killing of surrendering forces was an all participants type thing not entirely specific to Canada though. Even notes that Britain was particularly bad about surrendering enemies due to fake surrenders in the South African War just a decade or so before.
Get a prenup if that’s your only issue. Married taxes are better, and being auto beneficiary is also useful (e.g. social security survivors benefits). With the right person insurances and credit score/limit are better. Sometimes just hospital visits require being a relation. Immigration for coming to or going to another country is easier.
Marriage is showing your commitment legally/bureaucratically so that your bond isn’t questioned easily both individuals also gain financial benefits from it.