With characteristic determination he formulated plans for the invasion of German Southwest Africa without asking permission of the citizens of the South African Union or of the British Foreign Office. His vision comprehended an invasion that would have as its culmination a British-Boer colony where the German colony had been, and that from Cable Bay to the source of the Nile there would be one mighty union, with a great trunk railway feeding Egypt, the Soudan, Rhodesia, Uganda, and the Union of South Africa. An able lieutenant to Botha was General Smuts. He co-operated with his chief in a campaign of education. They pointed out the absolute necessity for deafness to the German tempters, and succeeded in obtaining full co-operation for the Botha plan of invasion from the British Imperial Government and the South African Union. Concerning this agreement General Botha said: "To forget their loyalty to the empire in this hour of trial would be scandalous and shameful, and would blacken South Africa in the eyes of the whole world. Of this South Africans were incapable. They had endured some of the greatest sacrifices that could be demanded of a people, but they had always kept before them ideals, founded on Christianity, and never in their darkest days had they sought to gain their ends by treasonable means. The path of treason was an unknown path to Dutch and English alike. "Their duty and their conscience alike bade them be faithful and true to the Imperial Government in all respects in this hour of darkness and trouble. That was the attitude of the Union Government; that was the attitude of the people of South Africa. The government had cabled to the Imperial Government at the outbreak of war, offering to undertake the defense of South Africa, thereby releasing the Imperial troops for service elsewhere. This was accepted, and the Union Defense Force was mobilized." Preliminary to the invasion of German Southwest Africa, General Botha proclaimed martial law throughout the Union. The first act in consequence of this proclamation was the arrest of a number of conspirators who were planning sedition throughout the Union. The head of this conspiracy was Lieutenant-Colonel S. G. Maritz. General Beyers and General De Wet, both Boer officers of high standing, co-operated with Maritz in an abortive rebellion. The situation was most trying for the native Boers and, to their credit be it recorded, the great majority of them stood out strongly against the Germans. Vigorous action by Botha and Smuts smashed the rebellion in the fall of 1914. A force acting under General Botha in person attacked the troops under General Beyers at Rustemburg on October 27th, and on the next day General Beyers sought refuge in flight. A smaller force acting under General Kemp was also routed on November 5th.