L'Attaque or The Attack is a French board wargame first published by Hermance Edan [fr] in 1909 which inspired the creation of later games, such as Stratego. Two players each move 36 ranked game pieces with hidden identities and challenge opposing pieces, the results of which are determined by the rank hierarchy, in order to either capture their opponent's Flag or manipulate the board so their opponent cannot make any further moves.

According to historian and game collector Thierry Depaulis, on November 26 1908 Frenchwoman Hermance Edan filed a patent for a "jeu de bataille avec pièces mobiles sur damier" (a battle game with mobile pieces on a gameboard) with the French Patent Office, based on a game she had developed in the 1880s.^[1][2] The patent (patent #396.795^[3]) was released in 1909 and the game began being sold by French game manufacturer Au Jeu Retrouvé in 1910 under the name "L'Attaque".^[4] It was sold in France by department store La Samaritaine, and appeared in Britain before World War I.^[5] In 1925, English game maker H.P. Gibson and Sons bought the rights to the game and began publishing at least until the 1970s,^[6] initially retaining the French name before eventually changing it to "The Attack".

L'Attaque is played on a 9×10 board with three 2-square lakes in the centre. Both players receive 36 standing rectangular cardboard pieces of various ranks, colour printed with soldiers in contemporary (to 1900) uniforms – not Napoleonic, as in Stratego – of red or blue. Each piece has a military hierarchal value and can only capture pieces with a lower rank than them. Players set up their pieces facing them in the first four rows of their side, such that neither player can see the rank of their opponent's pieces.^[9][10]

Players take turns moving one of their pieces a single space vertically or horizontally, although pieces cannot move into a space with a lake or another piece. If two pieces come face-to-face, the player whose turn it is can choose to attack. Both players then reveal their pieces and, unless their ability says otherwise, the one with the lower rank is captured and removed from the board. If the pieces are of equal rank, both are removed.^[10]

The game continues until a player captures either their opponent's Flag or all of their moveable pieces.

Eric Solomon, writing for Issue 24 of Games & Puzzles, described L'Attaque as "an inexpensive and unpretentious game not claiming to be realistic in any sense" and praised it for its fast pace and clarity of the rules.^[9]