Lee Greenwood has earned a handful of No. 1 singles during his country music career, but no song in the singer's catalog has been as culturally significant as his Top 10 patriotic anthem, 'God Bless the USA.'

The track first gained massive popularity in 1990 as a morale booster during the Gulf War, but later returned to prominence after the 9/11 attacks on the World Trade Center. "I believe it was blessed by God; I am a Christian and I feel that’s part of what I was brought to Nashville to do," Greenwood says about penning the No. 14 tune on the Top 100 Country Songs countdown. "I’ll never write probably another song that’s that good or that moving or that powerful for the American people."

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Listen to 'God Bless the USA' by Lee Greenwood