US and NATO have been big advocates for human rights and international law around the globe. I'm only focusing on Iraq and current military missions in the Middle East and violations of the Geneva Convention specifically waterboarding to gain 'intel.'
Geneva conventions on Humanitarian law:
The Geneva Conventions of 1949 and their Additional Protocols of 8 June 1977 contain a number of provisions that absolutely prohibit torture and other cruel or inhuman treatment and outrages upon individual dignity.
International human rights law, both universal and regional
torture is prohibited by Article 3 common to the four Geneva Conventions, Article 12 of the First and Second Conventions, Articles 17 and 87 of the Third Convention, Article 32 of the Fourth Convention, Article 75 (2 a & e) of Additional Protocol I and Article 4 (2 a & h) of Additional Protocol II. In international armed conflict, torture constitutes a grave breach under Articles 50, 51, 130 and 147 respectively of these Conventions. Under Article 85 of Additional Protocol I, these breaches constitute war crimes. In non-international armed conflict, they are considered serious violations.
https://www.icrc.org/eng/resources/documents/faq/torture-law-2011-06-24.htm
Dick Cheney under the Bush administration has openly talked about torture used by the CIA and even claimed he approved it.
Cheney's comments also mark the first time that he has acknowledged playing a central role in clearing the CIA's use of an array of controversial interrogation tactics, including a simulated drowning method known as waterboarding.
"I was aware of the program, certainly, and involved in helping get the process cleared," Cheney said in an interview with ABC News.
Asked whether he still believes it was appropriate to use the waterboarding method on terrorism suspects, Cheney said: "I do."
http://articles.latimes.com/2008/dec/16/nation/na-cheney16
Even recently, Obama did admit also that we "tortured some folks" during a press conference.
We tortured some folks”
Obama said during a White House news conference Friday.
“When we engaged in some of these enhanced interrogation techniques, techniques that I believe and I think any fair-minded person would believe were torture, we crossed a line. And that needs to be understood and accepted.”
http://www.politico.com/story/2014/08/john-brennan-torture-cia-109654
So why were no charges brought up by international or even federal courts for the government officials that were involved? The evidence was clear and there has even been admissions to it. Does the US not follow international laws and rules of engagement?