Possible Clues:

• A drop around the left, in short, for cover
• Covering that provides protection from the weather
• Cover, protection
• Give protection to lieutenant during change in course
• Scatter these around left and right for protection
• Let hers go into shielded place
• There's material about the inexperienced driver's protection
• Officer in fine cover
• Shield as from rain
• Platoon officer brought in to complete retreat