The Kruger telegram was a message sent by Germany's Kaiser Wilhelm II to Stephanus Johannes Paulus Kruger, president of the Transvaal Republic, on 3 January 1896. The Kaiser congratulated the president on repelling the Jameson Raid, a sortie by 600 British irregulars from Cape Colony into the Transvaal under the command of Leander Starr Jameson. The raid was intended to trigger an anti-government uprising by the primarily British expatriate miners, but was a fiasco with 65 of the raiders killed to only one Boer commando, and the rest surrendering.
Read more about Kruger Telegram: The Telegram, Reaction