Because the meteor showers caused landscapes to be lacerated and flooded, majority of the factions and groups of people will be travelling on vessels, especially pirates who raid and plunder the coasts or cratered rivers.
These commissioned and militant privateers have seized control of a military-grade stealth corvette to raid and plunder in serpentine fashion on top of their special-forces-like training and stealth tactics.
Inspired by the Drakkar ships in Valheim as well as the Normandy in the Mass Effect trilogy.