Join Date: Jul 2012
Photo List! You'll have to forgive me since I haven't been keeping up to date on popular ships.
The World: Everyone in one big photo
North America: USA, Canada, Mexico, Cuba
South America: Brazil, Peru, Ecuador, Venezuela, Argentina, Chile, etc.
Europe: Not listing it all
Asia: Again, I don't them all
Africa: Again, I don't them all
Middle East: Iraq, Afghanistan, Israel, etc.
NATO: US, England, Canada, France, Belgium, Denmark, Iceland, Italy, Luxembourg, Netherlands, Norway, Portugal, UK
Nordic Five: Denmark, Sweden, Finland, Norway, Iceland, and Sealand
Former USSR: Russia, Ukraine, Uzbekistan, Kazakhstan, Belarus, Azerbaijan, Georgia (the country), Tajikistan, Moldova, Kyrgyzstan, Lithuania, Turkmenistan, Armenia, Latvia, Estonia
Allies: US, UK, France, Russia
Axis: Italy, Japan, Germany
I know that can't possibly be all (I only went into Recently historic Large Groups) But it's a start.