http://www.onwar.com/chrono/1939/dec39/f30dec39.htm
Chinese lose air battle to Japanese
Saturday, December 30, 1939 www.onwar.com
In China... The revived Nationalist Chinese air force suffers a crushing defeat over Liuchow (Lanchow). Forty fighters challenge 13 Japanese Type-96 aircraft. In the ensuing air battle 14 of the Chinese planes are shot down without a Japanese loss.
In Hanoi... A breakaway group of Chinese Nationalists led by the former foreign minister of the Kuomintang, Wang Chingwei, signs an agreement with Japanese representatives to set up a rival Nationalist government under Japanese protection. Wang Chingwei is Tokyo-educated and was the main rival to Chiang Kai-shek for the leadership of the Kuomintang. Since the loss of Wuhan, he has become convinced that the war against Japan cannot be won.
In the Winter War... Finnish offensives against the Soviet 8th and 9th Armies continue. General Stern, formerly in command of the Soviet Far Eastern Army, is assigned to direct operations north of Lake Ladoga. Some 60 bombs are dropped by Soviet aircraft on Hango.
On the Western Front... Allied and German patrols are active between Moselle and Saar, despite intense cold.
http://homepage.ntlworld.com/andrew.etherington/month/thismonth/30.htm
December 30th, 1939
UNITED KINGDOM: Corvette HMS Marguerite laid down. (Dave Shiraw)
FINLAND: The Soviet leadership decides to re-evaluate the war-effort against Finland. All attacks are to cease for the time. (Mikko Härmeinen)
FRENCH INDOCHINA: Hanoi: A breakway group of Chinese Nationalists led by the Kuomintang’s ex foreign minister, Wang Chingwei, appears to have finalised agreement with Japan to set up a rival Nationalist government under Japanese protection. The Tokyo educated Wang Chingwei, once Chiang Kai-shek’s main rival for the Kuomintang leadership, fled to Hanoi a year ago to start a peace movement in response to Japan’s call for a “new order in Asia”. Since the loss of Wuhan he has become convinced that the war against Japan was unwinnable.
U.S.A.: An order for ten modified North American NA-50A fighters is received from the government of Siam. (Craig Paffhausen)