 Japan issued instructions to the government of Thailand to seal off its border with Indochina and to arrest all French and Indochinese residents within its territory.Instead, Thailand began negotiating with the Japanese over their course of action, and by the end of March they hadn't fully complied with the demands.Dōmei Radio (the official Japanese propaganda channel) announced that pro-Japanese independence organizations in Tonkin formed a federation to promote a free Indochina and cooperation with the Japanese.