Since Greg has this bizarre idea that a gun would stop a well armed foe, here's a picture of Ypres in West Flanders Belgium during one of the Three battles that raged through the Town during the 14-18 War. Not only was heavy artillery used, but so was poison gas. The third Battle is also known as the Battle of Passchendaele.
The airborne attack on Fort Eben-Emael also demonstrates Greg's historical ignorance.
You can correct grammar, Greg, but you know little else.