themes such as Midway, D-Day and PanzerBlitz. Board wargames such as Squad Leader, Tactics and Europa developed extremely complex and realistic rules. Avalon Hill's Civilization introduced the use of the technology tree (or "tech tree"), variants of which have been implemented in numerous later board and video games such as Sid Meier's Civilization. Recent wargames such as 'A distant plain', 'Labyrinth' and the satirical War on Terror have focused on counterinsurgency and contemporary terrorism. A concentrated design movement towards the German-style board game, or Eurogame, began in the late 1970s and early 1980s in Germany, and led to the development of board games such as Carcassonne, The Settlers of Catan, Agricola, Ticket to ride and Puerto Rico. Card games During the 15th century card suits began to approach the contemporary regional styles and the court cards evolved to represent European royalty. Early European card games included Noddy, Triomphe, All Fours, Piquet, Basset, Hofamterspiel, Karnöffel, and Primero. In 1674 Charles Cotton published his Compleat Gamester, one of the first books which set out to outline rules for many card and dice games. During the mid 16th century, Portuguese traders introduced playing cards to Japan. The first reference to twenty-one, the precursor of Blackjack is found in a book by the Spanish author Miguel de Cervantes. Cervantes was a gambler, and the main characters of his tale Rinconete y Cortadillo are cheats proficient at playing ventiuna (twenty-one). The game of Cribbage appears to have developed in the early 17th century, as an adaptation of the earlier card game Noddy. Pinochle was likely derived from the earlier Bezique, a game popular in France during the 17th century. 1742 saw the publication of Edmund Hoyle's 'Short Treatise on the Game of Whist' which became one of the bestselling publications of the 18th century. Whist was widely played during the 18th and 19th centuries, having evolved from the 16th century game of Trump (or Ruff) by way of Ruff and Honours. Baccarat first came to the attention of the public at large and grew to be widely played as a direct result of the Royal Baccarat Scandal of 1891, and bears resemblances to the card games Faro and Basset, both of which were very popular during the 19th century. The rules of Contract bridge were originally published in 1925, the game having been derived from Bridge games with rules published as early as 1886, Bridge