
40mm Gun Crew member ("Deck Talker") on the US Destroyer Escort 'USS Edsall (DE-129) ca.1943. Sailor with a USN Mk II talker helmet poses in a twin 40mm Bofors mount gun tub on the Destroyer Escort USS Edsall DE-129 in the Caribbean - 1943
Note four-round clips of 40mm Bofors ammunition in the clip holders and spent casings.

The concept of the ‘burh’, a term originating from Old English, played a pivotal role in the landscape of Anglo-Saxon England, particularly during the later stages of the period.
These fortified settlements, often established by King Alfred the Great and his successors, were a response to the increasing threat posed by Viking raids. The development of burhs marked a significant shift in the defensive strategies of the era and had lasting impacts on the urban and political development of England.
A burh was typically located at a strategically important site, such as a river crossing, a Roman fort, or at key points along established routes. The primary purpose of a burh was defence, and as such, they were constructed with substantial fortifications.
These defences usually included a high earth bank topped with a wooden palisade and a deep surrounding ditch. The design and construction of these fortifications were often based on existing Roman structures, utilising their strategic insights and building techniques.

So that is how helicopters are born!