Hello all.
The reason the Lake Towners destroyed their own bridge was a mix of battlefield tactics and good sense. First off, however:
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Just how did they destroy that bridge so quickly in the few moments it took Smaug to arrive and attack the town?
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The Hobbit reads "the bridge was thrown down and destroyed." I personally would presume it was by burning. Although "thrown down" appears to indicate it was ripped apart, Tolkien uses the word "destroy". If it was ripped down, Tolkien would have used words like "broken" instead, which seems to me to indicate it was burned. It would certainly make sense.
And now on to their motives for destroying the bridge.
It is simply good sense. I was watching a television program last night about escape scenarios in sporting arenas. The sporting arenas are unimportant; the point is it struck me that in an emergency, the first thing someone thinks of is to run and get out as fast as they can, forgetting about other members of the community besides their relatives. The first few who ran the bridge might have made it, but this would inspire more people to do the same and cause a massacre when Smaug burned the bridge. The authorities must have decided to rip it down to encourage escape by boat, which would give the populace as a whole more chance of survival.
It is good tactics. If the dragon was to attack via land, the defenders would be forced to confront it bit-by-bit, in small groups. Can you possibly imagine having to fire arrows into the maw of the beast, knowing that you are about to be incinerated and that they will merely bounce off? And to heighten the fear, only a few men near you, who you hardly know, are obligated to do this as well, and they are most likely running for their lives?
(This is why armies of antiquity used flaming arrows and bolts; it is utterly terrifying to think you might burn alive.) It would be a rout. Even if the men were all into suicide, they would make no impression upon Smaug's armour and would only get
one shot each.
I don't think dragons can hover; any soaring lizards of today can not fly efficiently and, more to the point, flying lizards of the dinosaurs' time such as Quetzalcoatlus could not hover or even take off without updrafts, and those creatures were built purely for flight. Smaug is built like a lizard in Tolkien's pictures, not a cat. Lizards such as Australian goannas can not curl up like a dragon would need to do in order to land on buildings. Therefore the dragon would be forced to do a series of fly-bys, with fire breath in short bursts, before wheeling around and attacking again. Indeed, in the book, Smaug is described as "swooping". (Coincidentally, the Hobbit video game has him hovering; as if!
) Smaug would have to exert himself far more than usual thanks to the jewels he weighed himself down with, for far less overall damage, exposing his most vulnerable area to the masses of archers, most likely on rooftops, who could fire all at once.
Think about it, people. This was the absolute best chance the people of Lake Town had. Escape via the bridge is an utterly farsical notion.
