Out of curiosity, I've been searching for the largest replay files I have, and the winner happened to be a very close and tough battle on the Ngorongoro map, which took place on November 27, 2016.
Map: Ngorongoro
Starring: (JeanClaude, comandantelobo, Boudica, samba) vs (JorgeGijon, kabaka, maxticatrix, Grugnas)
Summary: Grugnas expanded early in the central valley and then magically managed to hold the position against my sieging from the top. To me, it felt like a training in ballista packing / unpacking, where I tried and mostly failed to hide the siege engines before they got hacked down by the Skiritae. Anyway, it looked as if Grugnas was suiciding a lot of units to destroy one or two catapults while JeanClaude and samba kept slowly pushing on the enemy's main base, so the fight seemed to be going well for us. Not to spoil too much, let's just add that the game was finally decided by good trade and teamplay as is often the case.
commands.txt