The NATO bombing of power infrastructure in Serbia was investigated by the United Nations International Criminal Tribunal for the former Yugoslavia (ICTY). The ICTY prosecutors were satisfied with the evidence presented by NATO that the targeting was narrowly aimed only at infrastructure which specifically fed into key parts of the military air defence and command and control network, and that it had hit transformers and other easily replaceable elements rather than the main plants. [0]
So it was proportional, fulfilled a military purpose, and wasn't aimed at causing undue suffering of the civilian population.
[0] https://www.icty.org/en/press/final-report-prosecutor-commit...
It can be said that pretty much everything NATO did in 1999. in SRY, Putin is now doing in Ukraine.
That doesn't say much, everything I did in 1999 (as an uninteresting secondary school student) is also being done by people under Putin's control in Ukraine.
Well, almost anything. Can believe none are reading up on Wicca.
(Similarly, I didn't care much for the claim that Iraq had chemical weapons that could reach Iran, what with them sharing a border and thus a water rocket filled with chlorine gas would have filled this description).
The evidence that Iraq had chemical weapons and used them against Iranian forces is extensively documented. The Wikipedia page has a list of good resources. [0]
However, that programme was dismantled as a result of international inspections and pressure after the 1991 Gulf War, and it was not restarted by 2003 as claimed by the US government as part of their justification for the invasion that year. US troops did find a number of chemical weapons elements, but all it seemed dated from the previous programme.
[0]https://en.wikipedia.org/wiki/Iran%E2%80%93Iraq_War#Iraq's_u...