page_title: Harbor Defenses of Manila and Subic Bays
hierarchical_section_title: Harbor Defenses of Manila and Subic Bays
caption_attribution_description: English: A 12-inch seacoast gun emplaced at Battery Hearn on Fort Mills (Corregidor). Battery Hearn was one of the last fortifications built on Fort Mills prior to limitations of the Washington Naval Treaty taking effect in the 1920s. The 12-inch guns were the longest range weapons (27 km (16 mi)) on Corregidor and fired on Japanese forces on Bataan Peninsula.
context_page_description: The Harbor Defenses of Manila and Subic Bays were a United States Army Coast Artillery Corps harbor defense command, part of the Philippine Department of the United States Army from circa 1910 through early World War II. The command primarily consisted of four forts on islands at the entrance to Manila Bay and one fort on an island in Subic Bay.
context_section_description: The Harbor Defenses of Manila and Subic Bays ("Coast Defenses of Manila and Subic Bays" until 1925) (a.k.a. CD/HD Manila Bay) were a United States Army Coast Artillery Corps harbor defense command, part of the Philippine Department of the United States Army from circa 1910 through early World War II. The command primarily consisted of four forts on islands at the entrance to Manila Bay and one fort on an island in Subic Bay.
caption: 12-inch (305 mm) M1895 gun of Battery Hearn, Fort Mills circa 2010.
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