Reportedly, U.S. President Trump has threatened to attack Iranian cultural heritage with no military value, which would constitute a war crime.
This Stack Exchange answer cites an offline document on the individual responsibility in war crimes (emphasis mine):
- Those personnel who commit a war crime may be held individually responsible. In addition to the individual, others may be held responsible, such as the commander, those who aided and abetted an offense, and those who conspired with them to commit the crime—and even those who conspire to commit a war crime that does not occur.
Does threatening to attack cultural heritage constitute conspiracy to commit a war crime, even if the war crime does not occur? Does that make such a threat itself a war crime?