From the publisher:
On September 6th and 7th 1914, at the First Battle of the Marne, 600 Parisian taxis requisitioned by order of General Gallieni gather at the Invalides. The objective of this unprecedented military maneuver is to send quickly a reinforcement of 4000 men of an infantry brigade. As a lieutenant in charge of logistics, you cooperate to embark soldiers and organize convoys. You have a great responsibility: face the challenge without giving up to the pressure of taxis that accumulate!
"The taxis of the Marne" is cooperative card game. On a player turn, a new taxi arrives at the Invalides square and then the players plays 3 actions out of the 4 possible actions:
Mobilize soldiers (drawing a solder card)
Move an officer
Exchange (swap a card with an another player, or with the deck on solo mode)
Load and send a taxi
The game ends when all taxis have been sent or when the Invalides square is completely surrounded by unsent taxis.