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A pillbox is a type of blockhouse, or concrete dug-in guard-post, often camouflaged, normally equipped with loopholes through which defenders can fire weapons. It is in effect a trench firing step, hardened to protect against small-arms fire and grenades, and raised to improve the field of fire.
The eared pillbox is, like the lozenge pillbox, found only in the North East of England and has an irregular hexagon plan. There are two large embrasures intended for medium machine guns. There is a bulge at the base of the wall below the embrasures that is thought to have accommodated the cooling system for the machine gun.
A bunker is a defensive military fortification designed to protect people and valued materials from falling bombs, artillery, or other attacks. Bunkers are almost always underground, in contrast to blockhouses which are mostly above ground. [ 1 ]
There are at least three defensive structures documented in the cliffs above Tumon Beach. Cliffline Fortification One, about 8 miles (13 km) south of St. John's School, is a concrete structure 1.75 by 2.0 metres (5 ft 9 in × 6 ft 7 in), with a west-facing embrasure overlooking Tumon Bay.
An Indian Wehrmacht volunteer in a Tobruk DFP along the Atlantic Wall, 1944. During the fighting in North Africa (1942–43), U.S. forces employed the shell scrape.This was a very shallow excavation allowing one soldier to lie horizontally while shielding his body from nearby shell bursts and small arms fire.
Pillbox stepped embrasure, Taunton Stop Line, England. A stepped embrasure was often utilised on pillbox bunkers of the 20th century. This allowed for a relatively wide field of fire compared to a traditional embrasure while also minimising the shot trap result created by the sloped opening. A series of perpendicular "steps" that tapered to the ...
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A Pickett-Hamilton fort is a type of hardened field fortification built in Britain during the invasion crisis of 1940–1941. [2] The Pickett-Hamilton fort was designed to be lowered into the ground while it was not in use, to become inconspicuous and not interfere with the passage of taxiing aircraft or other vehicles.