Why did Sauron fall for Aragorn's trap?

In this video, we explain why Sauron didn't suspect a trap when Aragorn marched on the Black Gate, and why he took the bait so readily... Thanks to my patrons - Skjoldmø, bearandwolf, Will Harrison, Slowbro96, Vasco Sa Pinto, Gavin, Javi Iñesta ,Brn, JIV, Fipse, W Sean Mason, boi sophies, Stonetruck, ThunderStryken, Hallimar Rathlorn, Habimana, Ben Jeffrey, Harry Evett, Mojtaba Ro, Moe L, Paul Leone, Barbossa, mncb1o, Carrot Ifson, Andrew Welch and Catherine Berry Patreon -   / darthgandalf