Ooh, I don't know about that. France had much to be proud of before 1814. After that, not so much...that's what happens when 500,000 of your best men die in one year, leaving the rest to breed, giving you (drumroll) Vichey France.
Starting with William the Conqueror, a Frenchmen who conqueror England by pwning the British forces at the Battle of Hastings in 1066 (just barely made your millennium criteria).
France played a major roll in the Crusades. Most of the Templars were French, as are almost all of their Grand Masters. In fact, the general term for a European Christian in the Holy Land was "Franks." Then again, the Templars were taken down by the French king Phillip II, a greedy coward who brought false charges against the Templars because they rejected him for those same reasons.
France did NOT do well in the hundred year war...they actually got their a$$ kicked by the outnumbered and poorly equipped English peasant army. Remember Calais and Agincourt?
To give credit where its due, France was as responsible for the success of the American Revolution as the Americans. If you look at the actual battles fought, we (Americans) got our a$$es handed to us up and down the coast. We only managed to pull it off with the help of French soldiers, ships, weapons, and money (and France only helped us as a giant F-U to the English).
And then theres the French revolution, and the guy who almost conquered all of Europe. Im a big fan of Napoleon, and he was a great leader, though not as brilliant as his reputation boasts. He broke the one cardinal rule of European Warfare: never invade Russia from the West. But before that, he did manage to vassalize Italy, Austria/Hungry, Prussia, and Poland, and the other little states in between.