Manila Bay, formerly the capital of the Philippines, Manila
At the narrow intersection through which ships must pass, a battleship equipped with naval guns (called the U.S. Navy warship "USS Drum" can be seen.
This warship is made of concrete, so what method can the United States use to float a ship made of concrete on the surface of the sea? The United States, which occupied the Philippines in the 1898 U.S.-Spanish War, needed to defend the port of Manila at any time.
Although the more fleets and navies at sea against enemy ships, the better, there has never been an army with abundant weapons and soldiers.
As a result, the United States began to pay attention to the 4 islands scattered at the entrance of Manila Bay and advanced the fortressification plan to replace the warship armed islands.
The smallest of these islands is "Erfrelai Island" (a rocky island that can only be fished).
There is no flat ground, there is also a gun muzzle, and the rock strength is not suitable, which is impossible.
After much deliberation, perhaps not at all
1. Break the rocky island, leaving only the bottom.
2. Pour concrete into a battleship.
3. Set up the naval gun on a flat ground similar to the deck.
After five years from 1909, a battleship with a length of 100 meters, a width of 45 meters and a height of 12.2 meters was finally born.
2 twin main turrets, 14-inch guns, 4 guns
6-inch guns on the side, 4 guns
Top three-inch anti-aircraft guns, 3
The thickness of the façade is 8 to 11 meters, and the thickness of the ceiling is 7 meters
With the naval guns of the time were indestructible impregnable fortresses.
At the same time as the Pacific War began in 1941, the Japanese invasion of the Philippines expanded the scope of its occupation, but the fort dram with its strong defensive power became almost the last firepower.
Despite this, the Combined Forces Command, which had been shelled and attacked by the Japanese, was in pre-fall crisis, and the Coalition Forces throughout the Philippines surrendered, and eventually the Japanese occupied Dramburg.
Two years after the Battle of Manila Bay, the U.S. military began to retake the Philippines and tried to retake Fort Drum, but Fort Drum's strongest defense once again became a problem for the U.S. army.
On April 13, 1945, the U.S. army sneaked into Dramburg, injected a large amount of oil into the island, set up explosives and then carried out a large explosion.
In the fierce flames, the island burned for 5 days. After burning 65 Japanese troops, the Americans recaptured Fort Drum.
The shape of the war changed greatly, and the useless Dramborough was left untouched and left there untouched.