From the given sentence, extract the phrase (often noun or verb) that carries the given relationship. The generated phrase should be present in the sentence.

Given Relationship: 'invade', Sentence: '" I want to serve my country , " said Raad Faris Al Nafie , a former colonel from Balad , about 70 kilometres north of Baghdad , who was in the southern city of Basra when the United States invaded Iraq in March 2003 .'
invaded