For the next decade, Diệm lived as a private citizen with his family in Huế, although he was kept under surveillance. He spent his time reading, meditating, attending church, gardening, hunting, and in amateur photography. Diệm also conducted extensive nationalist activities during those 21 years, engaging in meetings and correspondence with various leading Vietnamese revolutionaries, such as his friend, Phan Bội Châu, a Vietnamese anti-colonial activist, whom Diệm respected for his knowledge of Confucianism and argued that Confucianism's teachings could be applied to a modern Vietnam. With the start of the World War II in the Pacific, seeing an opportunity for Vietnam to challenge French colonization, he attempted to persuade the Japanese forces to declare independence for Vietnam in 1942 but was ignored. Diệm also tried to establish relationships with Japanese diplomats, army officers, and intelligence operatives who supported Vietnam's independence. In 1943, Diệm's Japanese friends helped him to contact Prince Cường Để, an anti-colonial activist, who was in exile in Japan. After contacting Cường Để, Diệm formed a secret political party, the Association for the Restoration of Great Vietnam (Việt Nam Đại Việt Phục Hưng Hội), which was dominated by his Catholic allies in Hue. When its existence was discovered in the summer of 1944, the French declared Diệm to be a subversive and ordered his arrest. He flew to Saigon under Japanese military protection, staying there until the end of WWII.