Paris is the capital city of France.
Having come to his senses, the Eukarian Shockwave fled to Paris to hide and regain his strength. He remained there even as World War II broke out before he was tracked down by Centurion, who now believed all Cybertronians had to die, in 1943. Their battle attracted several IRON Troopers.
That same year, the Screaming Eagles arrived in the war-torn city to join forces with the French Resistance. Sgt. Savage and Garrison Kreiger bore witness to the fight between the two Eukarians before they left the city with the victorious Centurion to try and find the wreckage of the Axalon.
When Optimus Prime annexed the Earth, Kreiger was taking in the sights of a rebuilt Paris. After barely escaping from Dire Wraith assimilation, Joe Colton witnessed Prime's broadcast and called Kreiger stating it was time to take the fight to the Cybertronians. Somehow making his way to Paris in time for dinner, Colton began the preparations for the Iron Ring after Kreiger removed the Wraith bio-matter infecting the man.