Complex sentence: Similar to the Maginot Line, the Gin Drinkers Line was generally considered as a complete failure-the line and the entire Kowloon was abandoned by the British troops in just two days.
Split into simpler sentences: Similar to the Maginot Line, the Gin Drinkers Line was generally considered to be a complete failure. The line and the whole of Kowloon were abandoned by the British troops in just two days.