A military historian on the Siege of Gondor

[Galadriel55]

Originally Posted by Kuruharan

Unless an immediate assault is intended.

Yes. The plan was not to lay siege to Minas Tirith to starve it out, the plan was to conquer by fear and fire and dark magic within a few days and more onward to presumably secure the lands beyond - Gondor, Rohan, who knows how far west and north from there. Also, if the siege is taking too long, they might leave a sufficient force to guard the city while the bulk of the army might just move onward to subdue the small forces scattered around Gondor or reinforce the roads to allies, like they have with the Rohirrim, or do whatever other goal Sauron might have had. The invasion wasn't supposed to stop at conquering Minas Tirith.