The phrase "grateful nation" refers to a country or group of people who feel thankful and appreciative for something. It suggests that the nation acknowledges and values something or someone for their contributions or sacrifices. Full definition
A grateful nation gives its warriors at least a bit of help making the transition from military life to launching their own businesses. (entrepreneur.com)
On behalf of a grateful nation, Godspeed, John Glenn.» (entrepreneur.com)
On behalf of a grateful nation, Godspeed, John Glenn,» Obama said. (cnbc.com)