Pontoon bridge
Pontoon bridges were used to move across rivers, as swimming across rivers would take a long time and would also tire the soldiers. They were also a good alternative to regular bridges because they use less resources, can be made faster and can also be reused.
1. Why were these bridges created?
Pontoon bridges were used to move across water, because it took a long time to built a regular bridge and/or swim across.
2. How are they built?
They were built by connecting with planks and ropes.
3. How are they reusable?
Because they can be taken down and used in another river/area.
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