- December 3, 1941:
- Mobilization of the Nederlandse Militaire Luchtvaart (Dutch Royal Air Force).
- December 7, 1941:
- The battle of Pearl Harbor.
- The Dutch overnment declares war on Japan.
- December 10, 1941:
- Successful Japanese landing in the Philippines.
- Loss of the British battle ship Repulse and the Prince of Wales off east coast of Malaysia.
- December 16, 1941:
- Miri in British North Borneo (Serawak) occupied.
- December 17, 1941:
- Landing of Allied military forces (two-thirds Dutch and one-third Australian troops) on Portugese Island Timor near Dilli takes place without any resistence.
- December 19, 1941:
- Bombardment of Pontianak (Kalimatan) with extensive damage and 500 persons wounded or dead.
- December 21, 1941:
- Bombardment of airfield Singkawang II in West Borneo (now Kalimantan).
- December 23, 1941:
- Second bombardment of airfield Singkawang II.
- December 24, 1941:
- Kuching in British North Borneo (Serawak) occupied by Japanese forces.
- December 25, 1941:
- Third bombardment of airfield Sinkawang II.
- December 27, 1941:
- Occupation of the Tambelan Isands west of Kalimantan by Japanese forces.
- December 29, 1941:
- The 2nd battalion of the 15th Regiment Punjabi, defenders of Miri and Kuching, falls back on Singkawang II after suffering considerable losses.
- December 31, 1941:
- Japanese fighters machine gun the harbor and airfield of Tarakan Island and surrounding area of Menado off East Kalimantan (Sulawesi).
- January 1, 1942:
- Start of guerrilla activities in West Kalimantan.
- January 3, 1942:
- British General Sir Archibald P. Wavell is appointed commander-in-chief of the American, British, Dutch and Australian forces.
- January 4, 1942:
- Successful attack by eight Flying Fortresses from airfield in Malang, East Java, on the Japanese fleet near Davao (Mindanao), Philippines.
- January 5, 1942:
- Occupation of Brunei and the island of Labuan off Sabah.
- January 8, 1942:
- Bombardment of Tarakan Island.
- Repeat bombardment of Davao.
- January 9, 1942:
- Occupation of the island of Jolo, southwest of Mindanao.
- Repeat bombardment of Tarakan.
- January 10, 1942:
- General Wavell arrives in Java.
- Bombardment of airfield near Balikpapan, Kalimantan.
- January 11, 1942:
- Landing in Menado (Sulawesi).
- Landing of paratroopers in Menado.
- Landings in Tarakan.
- January 12, 1942:
- Dutch troops capitulate in Tarakan after heavy fighting.
- Dutch troops in Menado move inland to wage guerilla war.
- Heavy bombardment of Ternate (Molucca).
- January 13, 1942:
- Bombardment of harbor of Balikpapan.
- Heavy bombardment of airfield near Ambon.
- January 15, 1942:
- Bombardment of Balikpapan.
- Bombardment of airfield near Ambon.
- January 16, 1942:
- Bombardment of Kendari II airfield near Medan, area near Balikpapan and the harbor of Ambon.
- January 17, 1942:
- Bombardment of airfields in Pakanbaru (Sumatra), Dilli (Timor) and Ambon.
- January 18, 1942:
- Airfield Singkawang II destroyed.
- Bombing raid on Balikpapan.
- Arrival in Malaysia of four brigades of Dutch Corps Marachaussee from Aceh, north Sumatra, for guerilla activities behind enemy lines.
- January 19, 1942:
- Bombardment of Sabang and Bandjarmasin.
- January 20, 1942:
- Military forces in Balikpapan receive an ultimatum from the Japanese commander of Tarakan. Military commander in Balikpapan orders destruction of the oil installation and manufacturing center.
- Bombardment of Medan and Bandjarmasin.
- January 21, 1942:
- Bombardment of Sabang and Belawan (Medan harbor), Sumatra.
- January 22, 1942:
- Second bombardment of Sabang and Belawan.
- January 23, 1942:
- Dutch bombers launch a successful air raid on transport fleet in Makassar Strait near Balikpapan.
- Bombardments of Samarinda and Manokwari (Irian Jaya).
- January 24, 1942:
- Landing and occupation of Balikpapan.
- Bombardment of airfield Samarinda II.
- Landing on eastern shore of southeast Sulawesi and conquest of airport Kendari II.
- January 25, 1942:
- Heavy bombardment of Ambon and airfield Samarinda II.
- Bombardment of airfield Namlea (Buru Island).
- January 26, 1942:
- Bombardment of Sabang, airfield Samarinda II and airfields near Ujung Padang (Sulawesi) and in Timor.
- Landing on west coast of Kalimantan.
- January 27, 1942:
- Bombardment of Padang harbor and airfields near Bandjarmasin and Namlea.
- Landing in West Kalimantan near Singkawang.
- January 28, 1942:
- Bombardment of Bangka, Belitung (off Sumatra’s east coast), harbor of Padang and airports in Sulawesi.
- January 29, 1942:
- Bombardment of Sabang and Padang.
- Occupation of Pontianak, Kalimantan.
- January 30, 1942:
- Bombardment of Ambon, Sabang and airports in southeast Kalimantan and Timor.
- January 31, 1942:
- Superior Japanese troops land on the north and south coasts of the island of Ambon.
- February 1, 1942:
- City of Ambon occupied.
- Heavy bombardment of Palembang (Sumatra) and the airfields near Timor Kupang.
- Japanese advance to Bandjarmasin.
- February 3, 1942:
- Bombardment of Surabaya and the airfields near Malang and Madiun in East Java.
- The Japanese occupy Samarinda (Kalimantan).
- February 4, 1942:
- Bombardment of Timor Kupang.
- February 5, 1942:
- Bombardment of Ujung Padang and vicinity, Timor Kupang, Surabaya, airfields Denpasar (Bali) and near Palembang.
- February 7, 1942:
- Bombardment of the airfields near Palembang. A considerable number of British airplanes are lost.
- Bombardment of airfield near Bogor, West Java.
- Bombardment of Surabaya, East Java.
- Ambon falls into Japanese hands.
- February 8, 1942:
- Bombardment of airfield near Palembang.
- Destruction of Bandjarmasin and nearby airfield.
- February 9, 1942:
- Landing of Japanese troops on the west coast of Celebes near Ujung Padang.
- Bombardments of airfields in the vicinity of Jakarta, Pakanbaru (Sumatra) and Malang.
- Japanese troops land on the north side of Singapore Island.
- February 11, 1942:
- Oil installations in Pulusambu (south of Singapore,) Pangkalanberandan and Pangkalansusu (Sumatra) destroyed according to plans.
- February 12, 1942:
- Airfield Namlea occupied by Japanese forces.
- February 13, 1942:
- Bombardment of airfields in Timor and Sumatra.
- Bandjarmasin occupied by enemy forces.
- February 14, 1942:
- Japanese paratroopers land in the vicinity of Palembang but are driven off by Dutch troops.
- Dutch forces leave the Riau Archipelago en route to south Sumatra after execution of demolitions.
- February 15, 1942:
- Japanese forces land in the vicinity of Palembang.
- Demolitions of Sungaigerong (Sumatra) emplacements executed.
- Fall of Singapore.
- February 16, 1942:
- Dutch airplanes partially destroy an oil emplacement in Plaju, Sumatra.
- February 17, 1942:
- Heavy bombardment of Timor Kupang. Enemy transport approaches Timor Kupang. Planned demolition is carried out.
- February 18, 1942:
- Heavy bombardment of Surabaya. Japanese forces land on Bali. Den Pasar occupied.
- February 19, 1942:
- Heavy bombardment of airfields near Bogor and Bandung, West Java
- Bombardment of airfields in Kalijati and near Malang.
- Babo (Irian Jaya) occupied by Japanese forces.
- Landing of Japanese paratroopers near Timor Kupang.
- Night landing of Japanese troops west of Timor Dilli.
- February 21, 1942:
- Timor Kupang occupied by enemy.
- Bombardment of Surabaya, Malang, Madiun, and airfield Kilijati.
- February 22, 1942:
- Bombardment of airfields near Jakarta, Bogor, Yogyakarta and Malang.
- February 23, 1942:
- Bombardment of airfield near Malang.
- February 24, 1942:
- Bombardment of Tandjungpriok and Surabaya, airfields near Batavia (Jakarta) and Kalijati.
- February 25, 1942:
- Bangka occupied by Japanese forces.
- February 27, 1942:
- Bombardment of Tandjungpriok and airfield near Bogor.
- Aircraft carrier Langly with 30 ready-to-use fighters on board sunk by the Japanese.
- The Battle of the Java Sea lost.
- February 28, 1942:
- Bombardment of airfields near Surabaya.
- March 1, 1942:
- Landing of approximately seven Japanese divisions on Java in northwest Banten, near Eretan, west of Indramayu and in Kragan, east of Rembang.
- Japanese take Subang and the airfield in Kalijati by surprise.
- March 4, 1942:
- Heavy bombardments in the mountain passes north of Bandung.
- Tangerang (east of Jakarta), Leuwillang (west of Bogor), Cikampek, Blora, Cepoe and Bojonegoro occupied by Japanese.
- Air raid on Cilacap, Central Java.
- March 5, 1942:
- Jakarta declared an open city and occupied by Japanese forces.
- Heavy bombardment of Cilacap.
- Bombardment of Bandung.
- Surakarta occupied by the Japanese.
- March 6, 1942:
- Bombardment of Bandung and vicinity.
- March 7, 1942:
- State of affairs in Java very precarious.
- Bandung threatened.
- No Dutch air support available.
- March 8, 1942:
- Under threat of complete destruction of Bandung, Dutch forces decide to capitulate.
- March 9, 1942:
- Commander of the Dutch forces in central Sumatra decides to continue fighting in order to force prolonged stay of Japanese troops. The fighting in Timor and Central Sulawesi continues.
- March 12, 1942:
- Landing of Japanese troops on the east coast of Sumatra near Idi and south of Medan new Tandjungtiram.
- Landing on Sabang.
- March 13, 1942:
- Medan occupied.
- March 17, 1942:
- Padang occupied.
- March 19, 1942:
- Takengon in Aceh (Sumatra) occupied.
- March 27, 1942:
- Guerrilla troops in central Celebes capitulate.
- March 28, 1942:
- Military commanders of central and north Sumatra decide to capitulate.
- March 29, 1942:
- Ternate occupied.
- April 1, 1942:
- Atambua (Timor) occupied.
- April 12, 1942:
- Manokwari (Irian Jaya) occupied. Dutch troops go inland and continue guerrilla activities until September 1944.
- July 21, 1942:
- Dutch and Australian troops reinforce the garrison at Marauke (Irian Jaya).
- July 30, 1942:
- Landing on Tanimbar Island, Australia.
- December 10, 15, 18, 1942:
- Evacuation of Allied guerrilla troops from Timor to Australia.
- December 31, 1942:
- Fighting continues in Irian Jaya.
- One of the Dutch posts was attacked by Papua tribes under direction of Japanese. The Dutch side suffered some losses.
Source: Gedenkboek van de KNIL, Amersfoort: N.V. Drukkerij G.J. van Amerongen & Co, 1961. Translated by Denis Dutrieux and used without permission of Vereniging Madjoe in Holland.

