Pontoon bridge in 638. The army of the Umayyad Caliphate built a pontoon bridge over the Bosporus in 717 during the Siege of Constantinople (717–718). The Carolingian army of Charlemagne constructed a portable pontoon bridge of anchored boats bound together and used it to cross the Danube during campaigns against the Avar Khaganate in the 790s. Charlemagne's army built two fortified pontoon bridges across the Elbe in 789 during a campaign against the Slavic Veleti. The German army of Otto the Great employed three pontoon bridges, made from pre-fabricated materials, to rapidly cross the Recknitz river at the Battle on the Raxa
Pontoon (card game) Pontoon (card game) Pontoon is a name shared by two distinct card games, both blackjack variants. For those in Australia, Malaysia and Singapore, pontoon is a card game similar to match play 21 or Spanish 21, while in the UK, a game of pontoon holds closer to the traditional blackjack rules, but can be quickly distinguished by the verbal usage of the terms "twist" and "stick". The Malaysian version of pontoon is played in Australian, Malaysian, British, and Singaporean casinos. using multiple customized decks of cards. In the Treasury Casino, Brisbane, it is known as Treasury 21. In Jupiters Casino,