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".