On February 21, 1942, more than fifty anti-Japanese dissidents were taken to the island, tortured and killed in a mass execution.[15]: 18–19
Chinese Nationalist spokesmen reported that Chinese Communists shelled Dadan and Erdan between June 26–28, 1957. At that time, Chinese Nationalist strength on the islands was around 1,100 men.[16]
On September 6, 2011, President Ma Ying-jeou visited with the troops stationed on Erdan Island.[5][6]
In November 2013, the island was designated as battlefield culture landscape by the Cultural Affairs Bureau of Kinmen County Government.[17] The island was handed over from Kinmen Defense Command of the Republic of China Armed Forces to the county government on 1 July 2014.[18]
On August 16, 2022, two Taiwan soldiers on Erdan threw stones at a Chinese drone that got near their guard post.[19] On August 30, 2022, Taiwan soldiers on Erdan fired at a Chinese drone.[20]
On March 9, 2023, Chen Chia-hsun (陳嘉壎), a Taiwan soldier on Erdan, was missing at roll call. He allegedly deserted to China.[21][22]
Geography
The island covers an area of 0.28 km2 (0.11 sq mi).[2] Erdan Island's Mt. Jiaoshi (Mt. Jiaoshih; 礁石山) reaches 55 m (180 ft) above sea level.[11]
Dadan Island is 800 m (2,600 ft) from Erdan Island at the closest point.[15]: 24
Look up Erdan or Erhtan in Wiktionary, the free dictionary.
^行政面積. 金門縣政府民政處 Civil Affairs Department, Kinmen County Government (in Chinese (Taiwan)). 29 January 2019. Retrieved 9 August 2019. 外圍 島嶼 面積單位： (平方公里）{...} 二膽 0.2800
^Wendell Minnick (19 March 2019). "How to Save Taiwan from Itself". The National Interest. Retrieved 26 August 2019. Not to crow, but I have been on Dongyin, Erhtan and Tatan islands; the U.S. signal intelligence antenna farm at Pingtun Li; and inside the underground airbase in Chiashan Mountain in Hualien.
^ ab總統前往金門慰勉戍守國軍弟兄. 中華民國總統府 Office of the President Republic of China (Taiwan) (in Chinese (Taiwan)). 6 September 2011. Retrieved 11 October 2019. 中華民國100年09月06日 中秋節將屆，馬英九總統上午特地前往金門視導陸軍二膽守備隊
^ ab"總統前往金門慰勉戍守國軍弟兄（4-1）". 中華民國總統府 Office of the President Republic of China (Taiwan) (in Chinese (Taiwan)). Retrieved 11 October 2019. 二膽島
^ ab金門縣土地段名代碼表 (in Chinese (Taiwan)). Department of Land Administration. 5 September 2018. Retrieved 10 August 2019. 地政事務所名稱(代碼) 金門(WA) 鄉鎮市區名稱(代碼) 烈嶼鄉(05){...}段 小段 代碼 備註{...}二擔 0252 更正
^二膽島營區工程意外 工人遭怪手壓死. 金門縣政府全球資訊網 Kinmen County Government (in Chinese (Taiwan)). 30 April 2018. Retrieved 11 October 2019. 二膽島面積僅0.28平方公里，距離大膽島約800公尺、距離金門本島約12公里、距離廈門約4公里，島上只有駐軍，沒有一般居民。
^ abLin Ma-Teng 林馬騰 (July 2009). 秘島：大二膽的秘境秘史 (in Chinese (Taiwan)). 林馬騰文史工作室. ISBN978-957-41-6438-7.
