Blowing up dams--even if the dam is a military object--is a specifically enumerated war crime under the Geneva Conventions, if attacking that object would cause the release of dangerous forces (specifically: flooding) that attacks or could cause severe losses to the civilian population
@Pwnallthethings Contrast this with the lionisation of the UK Dambusters raid during WWII.
@katzmandu @Pwnallthethings history is written by winners and you won’t see the losers arguing the point