[{"id":"loc_ww2_situation_maps","name":"Library of Congress - World War II Military Situation Maps","notes":"Daily troop-position maps from June 6, 1944 to July 26, 1945.","type":"archival_maps","url":"https://www.loc.gov/collections/world-war-ii-maps-military-situation-maps-from-1944-to-1945/"},{"id":"nara_ww2_photos","name":"U.S. National Archives - World War II Photos","notes":"Selected public-domain photographs with no use restrictions.","type":"photographs","url":"https://www.archives.gov/research/military/ww2/photos"},{"id":"nara_cartographic_ww2","name":"U.S. National Archives - WWII Cartographic Records","notes":"Military maps, nautical charts, aerial photography, fortification plans.","type":"maps_and_aerial_photography","url":"https://www.archives.gov/research/cartographic/ww2"},{"id":"natural_earth","name":"Natural Earth","notes":"Public-domain vector and raster map data.","type":"base_geography","url":"https://www.naturalearthdata.com/"},{"id":"wikimedia_commons_ww2","name":"Wikimedia Commons - World War II media","notes":"Use only files with checked license metadata.","type":"media_and_maps","url":"https://commons.wikimedia.org/wiki/Category:World_War_II"},{"id":"ww2_seed_registry","name":"AP WWII Atlas source registry","notes":"Registered overview records used to structure the operational atlas interface.","type":"atlas_source_context","url":"https://araratpetrosyan.com/projects/world-war-ii-atlas/"},{"id":"west_point_atlas_ref","name":"United States Military Academy / West Point atlas references","notes":"Used as a reference family for campaign-map logic; not yet digitized into exact geometry.","type":"military_atlas_reference","url":"https://dhc.westpoint.edu/atlases/"},{"id":"us_army_cmh_campaigns","name":"U.S. Army Center of Military History - World War II campaign publications","notes":"Official U.S. Army historical publications and campaign map references.","type":"official_campaign_history","url":"https://history.army.mil/"},{"id":"ut_pcl_ww2_maps","name":"Perry-Castaneda Library - World War II Maps","notes":"Index of WWII maps, many from U.S. Army Center of Military History sources.","type":"map_index","url":"https://maps.lib.utexas.edu/maps/historical/history_ww2.html"},{"id":"hyperwar_ibiblio","name":"HyperWar - official WWII documents collection","notes":"Primarily official documents from U.S., U.K., and Commonwealth agencies.","type":"official_document_archive","url":"https://www.ibiblio.org/hyperwar/"},{"id":"truman_library_newsmap","name":"Harry S. Truman Library - European Theater Newsmap","notes":"European Theater map showing battle lines as of April 24, 1945.","type":"archival_map","url":"https://www.trumanlibrary.gov/maps/m1785-map-european-theater"},{"id":"loc_bender_german_maps","name":"Library of Congress - Karl Bender WWII German military intelligence map collection","notes":"German army and air force planning maps, aerial photography, and related cartographic material.","type":"captured_maps","url":"https://findingaids.loc.gov/subjects/6873"},{"id":"loc_twelfth_army_group_item_bulge_set","name":"Library of Congress - HQ Twelfth Army Group situation map set / Battle of the Bulge","notes":"Quadrangle sheets show positions of the 12th Army Group, adjacent Allied Forces, and German units from D-Day through July 26, 1945.","type":"archival_map_set","url":"https://www.loc.gov/item/2001628569/"},{"id":"loc_twelfth_army_group_1944_07_29","name":"Library of Congress - July 29, 1944 HQ Twelfth Army Group situation map","notes":"Source-registered archival situation-map item used as a digitization target.","type":"archival_map","url":"https://www.loc.gov/item/2004629092/"},{"id":"loc_twelfth_army_group_1944_12_11","name":"Library of Congress - December 11, 1944 HQ Twelfth Army Group situation map","notes":"Source-registered archival situation-map item used as a pre-Ardennes digitization target.","type":"archival_map","url":"https://www.loc.gov/item/2004630284/"},{"id":"loc_twelfth_army_group_1945_03_09","name":"Library of Congress - March 9, 1945 HQ Twelfth Army Group situation map","notes":"Source-registered archival situation-map item used as a Rhine campaign digitization target.","type":"archival_map","url":"https://www.loc.gov/item/2004631900/"},{"id":"loc_bulge_essay","name":"Library of Congress - Battle of the Bulge timeline essay","notes":"Context essay for the Ardennes campaign based on daily situation maps.","type":"collection_essay","url":"https://www.loc.gov/collections/world-war-ii-maps-military-situation-maps-from-1944-to-1945/articles-and-essays/the-battle-of-the-bulge/"},{"id":"wikidata_ww2_registry","name":"Wikidata World War II structured records","note":"Used as a source metadata registry for battles and operations; geometries remain point metadata until reviewed.","rights":"CC0","type":"structured_open_data","url":"https://www.wikidata.org/"},{"id":"project44_benchmark","name":"Project '44","notes":"Methodological benchmark for source-linked WWII unit positions, war diaries, and operational map precision. Registered as benchmark only; AP Atlas must not copy geometry or records without explicit rights or a documented export/API/partnership path.","rights":"external site; license/export/API/permission must be confirmed before data use","type":"external_benchmark_possible_source_partner","url":"https://www.project44.ca/"},{"id":"uk_tna_wwii_war_diaries","name":"The National Archives - British Army operations in the Second World War","notes":"WWII British Army operation and war diary source path","rights":"item-level rights/license/export review required before reuse","type":"source_discovery_reference","url":"https://www.nationalarchives.gov.uk/help-with-your-research/research-guides/british-army-operations-second-world-war/"},{"id":"lac_canadian_war_diaries","name":"Library and Archives Canada / Canadian war diaries reference path","notes":"Canadian unit war diaries; Project 44-style daily unit-position methodology reference","rights":"item-level rights/license/export review required before reuse","type":"source_discovery_reference","url":"https://www.crkn-rcdr.ca/en/reference-guide-war-diaries-second-world-war"},{"id":"nara_dday_digitized_operations_reports","name":"NARA - Digitized operations reports related to D-Day","notes":"D-Day/Norway? actually D-Day operation-report source discovery; item-level catalog links required","rights":"item-level rights/license/export review required before reuse","type":"source_discovery_reference","url":"https://text-message.blogs.archives.gov/2024/06/04/blood-and-determination-and-then-victory-digitized-operations-reports-related-to-d-day/"},{"id":"fold3_us_wwii_war_diaries_reference","name":"Fold3 - US WWII War Diaries reference","notes":"reference only unless licensed access/rights path exists","rights":"item-level rights/license/export review required before reuse","type":"source_discovery_reference","url":"https://www.fold3.com/publication/750/us-world-war-ii-war-diaries-1941-1945"}]