Blousing Trousers

The pear troopers were the only unit in world war too who were allowed to blouse their trousers. This is something i was not at all familiar with, blousing trousers. Can you explain what this is or what it means? I similarly, am unfamiliar with this concept, but eric explained it to meta. The basic of it is that pear troopers would tuck their jump trousers into their really tall jump boots. Some like corporal punched out a captain of another unit while on leave in paris because all the other units wanted to blouste their trousers too.