A Bailey Bridge is a type of modular bridge that is easy to assemble and disassemble. It was developed during World War II by the British engineer Sir Donald Bailey. The design allows for quick construction using prefabricated steel components, making it ideal for military and emergency use. These bridges can support heavy loads and span various distances, making them versatile for different applications. They are often used in temporary situations, such as disaster relief or military operations, but can also serve as permanent structures in some cases. Their simplicity and strength have made them a popular choice worldwide.