With 28 days left until Civ5, and 27 unique units in the game*, it seems like a good time to start a one-a-day UU countdown until release. It'll give a thread to discuss each UU in turn, as they're far more interesting than Civ4's (no more "+25% against <type>" Muskets!) and if nothing else, it'll pass the time until release. 
Unless otherwised noted, all information comes from AriochIV's excellent site, TheMystic, Azazell, and ltarmstrong3.
Today's UU is the French Foreign Legion, an upgraded Modern Infantry. Historically formed in 1831 as a way to bring non-French nationals into the French army, the Foreign Legion is legendary for its tenacity (famously fighting to the literal last three men in the Battle of Camaron) and the rigorousness of its training. Fittingly enough, the Civ5 Foreign Legion gets a bonus to fighting outside of friendly territory, representing their use in non-domestic combat.
Operationally, the use of the Foreign Legion at first appears offensive: declare war, send out your Legionnaires, and enjoy their bonus over other Infantry. If two lines of Infantry/Artillery run into each other, the Foreign Legion could very well give the edge to the French general in breaking through lines. Similarly, if another player declares war on France, a line of Foreign Legion would make for an excellent forward defense. The best kind of enemy invasions are the ones that never make it to your borders, and the Foreign Legion specializes in that.
Their pre-requisite tech, Replaceable Parts, only requires Steam Power; if Ancien Regime still ends with Steam Power, going right for Replaceable Parts will certainly make the transition out of free culture easier.
*The reason I'm off by one day (other than "ShaqFu can't count") is because I'll need a day off this coming Saturday for a convention.
The Countdown
Day 28: The Foreign Legion
Day 27: The Legion
Day 26: The Chu-Ko-Nu
Day 25: The Sipahi
Day 24: The Minuteman
Day 23: Day Off!
Day 22: The Samurai
Day 21: The War Chariot
Day 20: The Naresuan's Elephant
Day 19: The Camel Archer
Day 18: The Longbowman
Day 17: The Landsknecht
Day 16: The Janissary
Day 15: The Zero
Day 14: The Immortal
Day 13: The Companion Cavalry
Day 12: The Hoplite
Day 11: The Jaguar
Day 10: The Musketeer
Day 9: The Mohawk Warrior
Day 8: The Panzer
Day 7: The Ballista
Day 6: The War Elephant
Day 5: The B-17
Day 4: The Cossack
Day 3: The Mandekalu Cavalry
Day 2: The Ship of the Line

Unless otherwised noted, all information comes from AriochIV's excellent site, TheMystic, Azazell, and ltarmstrong3.
Today's UU is the French Foreign Legion, an upgraded Modern Infantry. Historically formed in 1831 as a way to bring non-French nationals into the French army, the Foreign Legion is legendary for its tenacity (famously fighting to the literal last three men in the Battle of Camaron) and the rigorousness of its training. Fittingly enough, the Civ5 Foreign Legion gets a bonus to fighting outside of friendly territory, representing their use in non-domestic combat.
Operationally, the use of the Foreign Legion at first appears offensive: declare war, send out your Legionnaires, and enjoy their bonus over other Infantry. If two lines of Infantry/Artillery run into each other, the Foreign Legion could very well give the edge to the French general in breaking through lines. Similarly, if another player declares war on France, a line of Foreign Legion would make for an excellent forward defense. The best kind of enemy invasions are the ones that never make it to your borders, and the Foreign Legion specializes in that.

*The reason I'm off by one day (other than "ShaqFu can't count") is because I'll need a day off this coming Saturday for a convention.
The Countdown
Day 28: The Foreign Legion
Day 27: The Legion
Day 26: The Chu-Ko-Nu
Day 25: The Sipahi
Day 24: The Minuteman
Day 23: Day Off!
Day 22: The Samurai
Day 21: The War Chariot
Day 20: The Naresuan's Elephant
Day 19: The Camel Archer
Day 18: The Longbowman
Day 17: The Landsknecht
Day 16: The Janissary
Day 15: The Zero
Day 14: The Immortal
Day 13: The Companion Cavalry
Day 12: The Hoplite
Day 11: The Jaguar
Day 10: The Musketeer
Day 9: The Mohawk Warrior
Day 8: The Panzer
Day 7: The Ballista
Day 6: The War Elephant
Day 5: The B-17
Day 4: The Cossack
Day 3: The Mandekalu Cavalry
Day 2: The Ship of the Line