Elfcrusher wrote:
The greater point, of course, is that Tolkien (or any great storyteller) doesn't restrict his tales to things unfolding in predictable ways. He weaves tales about how things deviated from predictability, as you pointed out with the reference to the Palantir.
He drew great inspiration from actual history of course (but even more from fictional history) and spent a lot of time detailing his own made-up histories, but I don't think he ever said, "Gosh, I have this great story idea, but it's improbable from a military realism perspective so I guess it won't work..."
Of course he didn't. It's the good mix in his stories that make them so popular and fascinating. On the one side you have the great storytelling part, but this isn't alone, but immersed and embedded in a rich and believable secondary world, that follows the laws of our own so closely that we really have the feeling it could be "real".
Both the storytelling part as well as the meticulously developed secondary history/world would stand out much poorer if each lacked the other.
Coming back to the subject, there is a basic and always correct rule to military operations: No battle plan survives the first contact with the enemy. It is normal that not everything works out the way the general/leader thought they will. Sometimes the changes are minor, sometimes they upset your whole strategy. That is why battles are lost and won against the odds or probabilities. Therefore every military commander with a minimum of ability should keep sufficient reserves at hand to deal with unforeseen developments. And he must be prepared to react flexible to changing tactical or operational situations.
This is clearly recognisable in Tolkien's books as well: The Battle of Five Armies develops in an unforeseen direction, with the tide of battle turning from one side to the other several times and each side using their resources skillfully.
Even more so, the LotR shows that Tolkien did it right: Sauron (through the Witch-king) expects the Rohirrim will aid Gondor (as they have done for centuries) and so he puts a sufficient force in the way to block their advance. The Rohirrim are not caught unprepared either (e.g. stumbling upon the blocking force), but scout ahead and gain sufficient intelligence to find a solution. Then comes the unexpected help in the person of Ghan-buri-ghan which enables the Rohirrim to bypass the blocking force.
On the Pelennor Fields, the Witch-king has planned the assault with great care. Especially he has a tool at hand to deal with the incredibly strong gate. Then comes the unexpected attack of the Rohirrim, but instead of panicking or losing his head in face of a change in the situation, he reacts professionally to the new threat (Tolkien emphasises this especially). Even when he is defeated, his second-in-command skillfully uses the reserves to deal with the new (and wholly unforeseen) situation. In the end the West wins, but it is a hard-fought and dearly-bought victory, since the Enemy was a professional one, well led and fighting hard (a major difference to the bad guys in Star Wars for example who often make the impression of being bloody amateurs).
In the context of the subject of this thread, we can work out what would be the most likely plan of each side given their situation and level of intelligence. We should also have an idea about the level of skill of both commanders to see how they will react to a change in plans and situation.
What exactly will go awry and not according to plan is an entirely other matter of course.
Cheers
Tolwen