It's Tunes For Our Troops!
The first is a contemplative boat song.
Rachmaninov: Barcarolle, Op. 11/1
The second is a lively tune with a beautiful trio section.
The third is a sad folk theme.
The fourth shows a fun-loving side of the composer.
The fifth is a little love song.
The final piece is a Russian folk theme used by many composers, including Beethoven. What an amazing ending!