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Coastal defence weapons throughout history were heavy naval guns or weapons based on them, often supplemented by lighter weapons. In the late 19th century separate batteries of coastal artillery replaced forts in some countries; in some areas, these became widely separated geographically through the mid-20th century as weapon ranges increased.
16 in Mark III coastal defense gun on a proof mount at Aberdeen Proving Ground, Maryland. The second 16-inch (406 mm) gun was the United States Army 50 caliber Model 1919 (M1919). The first of these was deployed to Fort Michie , Great Gull Island , New York on a unique all-around-fire M1917 disappearing carriage, with elevation increased from ...
Activation of the National Guard and expansion of regular harbor defense regiments to wartime strength resulted in 45,000 troops assigned to this function by fall 1941. Including field artillery units deployed in coast defense, harbor defense forces peaked at 70,000 troops from spring 1942 until mid-1943. In 1943–44, with most of the new ...
When the United States gained independence in 1783, the seacoast defense fortifications were in poor condition. Concerned by the outbreak of war in Europe in 1793, the Congress created a combined unit of "Artillerists and Engineers" to design, build, and garrison forts in 1794, appointed a committee to study coast defense needs, and appropriated money to construct a number of fortifications ...
The Department of Defense announces contracts valued at $7 million or more each business day at 5 pm. [2] All defense contractors maintain CAGE (Commercial and Government Entity) Codes and are profiled in the System for Award Management (SAM). [3]
In 1925 the commands were renamed as Harbor Defense Commands, and in 1935 the Harbor Defenses of Eastern New York was almost entirely disarmed, although possibly retaining the minefield capability. The New York and Sandy Hook commands and the Harbor Defenses of Long Island Sound were unified as the Harbor Defenses of New York on 9 May 1942.
The 28 cm MRK L/35 gun was a built-up gun made from three layers of reinforcing hoops.It used a cylindro-prismatic horizontal sliding breech, but unlike later Krupp guns it didn't use a metallic cartridge case.
The 12-inch coast defense mortar was a weapon of 12-inch (305 mm) caliber emplaced during the 1890s and early 20th century to defend US harbors from seaborne attack. [note 1] In 1886, when the Endicott Board set forth its initial plan for upgrading the coast defenses of the United States, it relied primarily on mortars, not guns, to defend American harbors.