Demon Cannon and Ole' Faithful

Imagine two cannons, one built in the abyssal reaches of the realm of Orcus and the other a mortal crafted cannon.  Both were the largest cannons of the time.  The hordes of the Black Tide sought to prove there superiority not just in war but in engineering and valor.  The Black Tide was led by unusual and vain figures, some sought power over domination, and some fought for the glory of personal valor.   This came to fore in an epic battle called the Occupation of Milithian.

The Black Tide sought to prove that their cannon was better than Milithian's great cannon.  The Black Tide moved the Squealer of the Abyss into position to counter-battery fire the defenders mighty cannon called Ole' Faithful.  The two cannons fired upon each other for hours and saw their crews replaced multiple times.  The cannons themselves, were barely damaged from each others counter-battery fire.

When Milithian's sea wall was breached, the garrison ordered the sinking of the barge holding Ole' Faithful.  The cannon crew continued to fire Ole' Faithful as she sunk into the depths.  The defenders held the city and later raised Ole' Faithful.  Today, it is a monument to the heroes that died while manning it and those that perished in the defense of the city.