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      "type": "Feature",
      "properties": {
        "id": "opzone_poland_1939",
        "name": "Invasion of Poland operational zone",
        "type": "operation_zone",
        "theater": "Europe",
        "source": "ww2_seed_registry",
        "confidence": "schematic",
        "review_status": "seed_record",
        "geometry_status": "schematic",
        "operation_id": "operation_invasion_poland",
        "start_date": "1939-09-01",
        "end_date": "1939-10-06",
        "actors": [
          "Germany",
          "Soviet Union",
          "Poland"
        ],
        "summary": "Schematic campaign zone for the invasion and partition of Poland."
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      "geometry": {
        "type": "Polygon",
        "coordinates": [
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      "type": "Feature",
      "properties": {
        "id": "opzone_france_1940",
        "name": "Battle of France operational zone",
        "type": "operation_zone",
        "theater": "Western Front",
        "source": "ww2_seed_registry",
        "confidence": "schematic",
        "review_status": "seed_record",
        "geometry_status": "schematic",
        "operation_id": "operation_battle_france",
        "start_date": "1940-05-10",
        "end_date": "1940-06-25",
        "actors": [
          "Germany",
          "France",
          "United Kingdom"
        ],
        "summary": "Schematic campaign zone for German operations in the Low Countries and France."
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      "geometry": {
        "type": "Polygon",
        "coordinates": [
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    },
    {
      "type": "Feature",
      "properties": {
        "id": "opzone_barbarossa_1941",
        "name": "Operation Barbarossa operational zone",
        "type": "operation_zone",
        "theater": "Eastern Front",
        "source": "ww2_seed_registry",
        "confidence": "schematic",
        "review_status": "seed_record",
        "geometry_status": "schematic",
        "operation_id": "operation_barbarossa",
        "start_date": "1941-06-22",
        "end_date": "1941-12-05",
        "actors": [
          "Germany",
          "Soviet Union"
        ],
        "summary": "Broad schematic Axis invasion corridor into the Soviet Union."
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      "geometry": {
        "type": "Polygon",
        "coordinates": [
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    },
    {
      "type": "Feature",
      "properties": {
        "id": "opzone_stalingrad_1942",
        "name": "Stalingrad operational zone",
        "type": "operation_zone",
        "theater": "Eastern Front",
        "source": "ww2_seed_registry",
        "confidence": "schematic",
        "review_status": "seed_record",
        "geometry_status": "schematic",
        "operation_id": "operation_stalingrad",
        "start_date": "1942-08-23",
        "end_date": "1943-02-02",
        "actors": [
          "Germany",
          "Soviet Union"
        ],
        "summary": "Schematic Volga-Don operational zone for the Stalingrad battle and encirclement."
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      "geometry": {
        "type": "Polygon",
        "coordinates": [
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          ]
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      }
    },
    {
      "type": "Feature",
      "properties": {
        "id": "opzone_kursk_1943",
        "name": "Kursk salient operational zone",
        "type": "operation_zone",
        "theater": "Eastern Front",
        "source": "ww2_seed_registry",
        "confidence": "schematic",
        "review_status": "seed_record",
        "geometry_status": "schematic",
        "operation_id": "operation_kursk",
        "start_date": "1943-07-05",
        "end_date": "1943-08-23",
        "actors": [
          "Germany",
          "Soviet Union"
        ],
        "summary": "Schematic Kursk salient operational zone."
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      "geometry": {
        "type": "Polygon",
        "coordinates": [
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    },
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      "type": "Feature",
      "properties": {
        "id": "opzone_normandy_1944",
        "name": "Normandy operational zone",
        "type": "operation_zone",
        "theater": "Western Front",
        "source": "ww2_seed_registry",
        "confidence": "schematic",
        "review_status": "seed_record",
        "geometry_status": "schematic",
        "operation_id": "operation_overlord",
        "start_date": "1944-06-06",
        "end_date": "1944-08-30",
        "actors": [
          "Allies",
          "Germany"
        ],
        "summary": "Schematic Normandy lodgement and breakout zone."
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      "geometry": {
        "type": "Polygon",
        "coordinates": [
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      }
    },
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      "type": "Feature",
      "properties": {
        "id": "opzone_bagration_1944",
        "name": "Operation Bagration operational zone",
        "type": "operation_zone",
        "theater": "Eastern Front",
        "source": "ww2_seed_registry",
        "confidence": "schematic",
        "review_status": "seed_record",
        "geometry_status": "schematic",
        "operation_id": "operation_bagration",
        "start_date": "1944-06-22",
        "end_date": "1944-08-19",
        "actors": [
          "Soviet Union",
          "Germany"
        ],
        "summary": "Schematic Belarus offensive zone."
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      "geometry": {
        "type": "Polygon",
        "coordinates": [
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              22.0,
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          ]
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    },
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      "type": "Feature",
      "properties": {
        "id": "opzone_berlin_1945",
        "name": "Battle of Berlin operational zone",
        "type": "operation_zone",
        "theater": "Eastern Front",
        "source": "ww2_seed_registry",
        "confidence": "schematic",
        "review_status": "seed_record",
        "geometry_status": "schematic",
        "operation_id": "operation_berlin",
        "start_date": "1945-04-16",
        "end_date": "1945-05-02",
        "actors": [
          "Soviet Union",
          "Germany"
        ],
        "summary": "Schematic final operation zone around Berlin."
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      "geometry": {
        "type": "Polygon",
        "coordinates": [
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              12.0,
              51.5
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          ]
        ]
      }
    },
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      "type": "Feature",
      "properties": {
        "id": "opzone_guadalcanal_1942",
        "name": "Guadalcanal operational zone",
        "type": "operation_zone",
        "theater": "Pacific",
        "source": "ww2_seed_registry",
        "confidence": "schematic",
        "review_status": "seed_record",
        "geometry_status": "schematic",
        "operation_id": "operation_guadalcanal",
        "start_date": "1942-08-07",
        "end_date": "1943-02-09",
        "actors": [
          "United States",
          "Japan"
        ],
        "summary": "Schematic Solomon Islands operational zone."
      },
      "geometry": {
        "type": "Polygon",
        "coordinates": [
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    },
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      "type": "Feature",
      "properties": {
        "id": "opzone_philippines_1944",
        "name": "Philippines liberation operational zone",
        "type": "operation_zone",
        "theater": "Pacific",
        "source": "ww2_seed_registry",
        "confidence": "schematic",
        "review_status": "seed_record",
        "geometry_status": "schematic",
        "operation_id": "operation_manila_liberation",
        "start_date": "1944-10-20",
        "end_date": "1945-03-03",
        "actors": [
          "United States",
          "Philippines",
          "Japan"
        ],
        "summary": "Schematic Philippines campaign zone."
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      "geometry": {
        "type": "Polygon",
        "coordinates": [
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              119.0,
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      }
    },
    {
      "type": "Feature",
      "properties": {
        "id": "opzone_iwo_okinawa_1945",
        "name": "Iwo Jima and Okinawa operational zone",
        "type": "operation_zone",
        "theater": "Pacific",
        "source": "ww2_seed_registry",
        "confidence": "schematic",
        "review_status": "seed_record",
        "geometry_status": "schematic",
        "operation_id": "operation_okinawa",
        "start_date": "1945-02-19",
        "end_date": "1945-06-22",
        "actors": [
          "United States",
          "Japan"
        ],
        "summary": "Schematic late Pacific island assault zone."
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      "geometry": {
        "type": "Polygon",
        "coordinates": [
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              144.0,
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              124.5,
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              28.0
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    }
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}