You’re a Grand Old Flag George M. Cohan

You’re a grand old flag,
You’re a high-flyin’ flag;
And forever in peace may you wave;
You’re the emblem of
The land I love;
The home of the free and the brave.
Ev’ry heart beats true,
‘Neath red, white and blue
Where there’s never a boast or brag;
But should old acquaintance be forgot,
Keep your eye on the grand old flag.

Probably the most patriotic song ever written.  It was initially titled, "You're a Grand Old Rag",
but then Cohan thought better and dumped the "rag".