I really like the song, but he has factual errors in nearly every line!
In May of 1941 the war had just begun
20 months earlier is hardly “just begun”, like InWinnipeg mentioned.
The Germans had the biggest ship that had the biggest guns
No, there were lots of bigger ships – the liner Queen Mary was quite a bit bigger, as were a lot of cargo vessels. Even if we limit it to battleships, Japan had a bigger one.
The Bismarck was the fastest ship that ever sailed the sea
No, again the Queen Mary was faster (30.9 knots to the Bismarks 30.1) as was the Normandie. And those were recorded speed records, while the Bismark’s was not.
On her decks were guns as big as steers and shells as big as trees
Obviously reversed here (to make the rhyme work).
Out of the cold and foggy night came the British ship the Hood
It wasn’t night, it was 6am. And being between Greenland & Iceland, obviously cold, but there isn’t much fog at those temperatures. It was the ship Prince of Wales that came out first, the Hood was behind.
The Hood found the Bismarck and on that fatal day
No, the British ships HMS Suffolk and Norfolk had found Bismark the evening before, and had been following her ever since.
The Bismarck started firing fifteen miles away
The Hood started firing first, when they were about 12.5 miles apart. Bismark didn’t fire until 2 minutes later, when they were only 11 miles apart.
We gotta sink the Bismarck was the battle sound
But when the smoke had cleared away the mighty Hood went down
The Hood was hit, exploded, and sank all within 3 minutes – hardly time for the smoke to have cleared. In fact, it was the smoke that enabled Prince of Wales to escape from the battle.
*
For six long days and weary nights they tried to find her trail*
HMS Suffolk was fitted with the new radar, so was able to continue shadowing Bismark most of this time. It was only the last couple of days when Bismark managed to get away. Even then, radio monitoring gave the British a fair idea of where Bismark was.
Churchill told the people put every ship asail
Why he told the people instead of the Navy is curious. And would you really send sailboats into the North Atlantic? But in fact, only a limited number of British ships were sent after the Bismark – most were busy and could not be spared. Many of the ones sent were old, obsolete ships, like the carrier Ark Royal that was sent from the Mediterranean.
Cause somewhere on that ocean I know she’s gotta be
Well, at least this line has no factual errors (but not much info, either).
The fog was gone the seventh day and they saw the morning sun
Ten hours away from homeland the Bismarck made its run
Bismark was going toward the coast of France, hardly her homeland. And it wasn’t much of a run, since an airplane bomb the evening before had jammed her steering, so she was only able to cruise in a circle.
The British guns were aimed and the shells were coming fast
The first shell hit the Bismarck they knew she couldn’t last
Not aimed very well – only about 1 in 7 of the shells fired hit the Bismark, and most of them just bounced off her armor. And she wasn’t sunk by gunfire, nobody claims that. The British battleships were nearly out of shells and had been sent home before the Bismark sank. She was hit by torpedoes just before sinking, but at the same time survivors have said they were ordered to open valves and scuttle the ship, to prevent her capture. Recent examination of the underwater wreckage seems to confirm the scuttling theory – none of the shell hits below the waterline actually penetrated the Bismark’s armor.