It depends on what you mean by "strongest".
Strongest by military? Diplomacy? Trade? Economy?
Warlord as in the shichibukai? It is still unknown of who is the strongest or what all of their full abilities are. It is impossible to know who is strongest at this point in the story.
There are many Water Type Pokemon in Pokemon Platinum, however, there is only one strongest one. That Pokemon is Palkia. Palkia is one of the Main Storyline Legendaries in Pokemon Pearl, it is a Water/Dragon Type. If you are looking for the strongest Non-Legendary, your best bet is Gyarados. Any exceptions?
A Meditite,Machoke and strongest one in Lucario
The sage of six paths.
triangle is the strongest polygon
The answer to what the top 40 strongest countries are would vary, depending on what aspect you want to know aabout. The top 40 strongest countries in agriculture, for example, might be very different from the top 40 strongest countries in education.
England is the biggest and strongest.
They were very strong at there time but in any other way, no.
I think one result was that Germany had the strongest army in Europe, and the second strongest navy (only second to England)
australia
turky
france
At the end if the Middle Ages, the strongest countries in Western Europe were probably England, France, and Spain. In Eastern Europe, the strongest was the Ottoman Empire, though much of it was in Asia.
BENIN
China and korea
Argentina, Brazil, and Italy.
america and israel