F B
Encyclopedia
The F B was a military transport used for crossing difficult swamp
Swamp
A swamp is a wetland with some flooding of large areas of land by shallow bodies of water. A swamp generally has a large number of hammocks, or dry-land protrusions, covered by aquatic vegetation, or vegetation that tolerates periodical inundation. The two main types of swamp are "true" or swamp...

y terrain. It had a seven man crew and had rubber floats attached to its treads to prevent it from sinking.
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