It is dubbed. Hawkins had throat cancer surgery that removed his larynx around 1966. According to the imdb, his voice in subsequent films was dubbed by either Charles Gray or Robert Rietti.
Superb recreation of Napoleon's last stand. Bondarchuk's version of War And Peace is the definitive filmed version of Tolstoy's masterpiece and Waterloo is also superb. Great recreation of the legendary battle.
There is a region 2 DVD available: It is an anamorphic 2.35:1 DVD-5 with DD 4.0 sound. The transfer is not perfect, but is still excellent overall, but some remastering and a higher bitrate DVD-9 would render a great transfer, I'm sure. Low price, too.
Bondarchuk's, Destiny Of A Man is also a must-have.
I hope that They Fought For Their Country gets released on DVD at some point.