Earlier quoted context omitted.
Actually, the US worked to fabricate evidence in collaboration with the UK too. The UK had an expert produce the so called "dodgy dossier", that was used as Blair's justification to follow the US into their illegal war. The media called it out as obvious bullshit, then the guy that produced the report allegedly committed a timely suicide.
But the EU didn't join the war.
The UK, Spain, Italy and a few other EU countries took part in the illegal invasion of Iraq.