Thrasyllus of Mendes commented on Caligula saying he had "no more chance of becoming emperor than of riding a horse across the Bay of Baiae". After he became emperor, Caligula constructed a temporary bridge across the Baiea using ships as pontoons and rode his horse across. en.wikipedia.org/wiki/Cal…
Herodotus purports that Xerxes I of Persia dealt with the destruction of two pontoon bridges in a storm by having his men shout at the water while whipping it and branding it with irons en.wikipedia.org/wiki/Dar…
After his first pontoon bridge to cross Hellespont was ruined by a storm, Xerxes I of Persia beheaded the builders and punished for Hellespont, by throwing fetters into the strait, whipping it 300 times and branding it with red-hot irons as his soldiers shouted. The next bridge worked. en.wikipedia.org/wiki/Xer…
Winston Churchill helped create artificial docks during WW2. Code named Operation Mulberry. Designed for 9 weeks these pontoons lasted 9 months and carried 500,000 troops and machinery to and from the shores of Normandy. en.wikipedia.org/wiki/Ope…

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