Book excerpt: Taiwan's relationship with mainland China is one of the most fraught in East Asia, a key issue in the island's domestic politics, and a major obstacle in Sino-American relations. Between Assimilation and Independence explores the roots of this conflict in the immediate postwar period, when the Nationalist government led by Jiang Jieshi took control of the island after fifty years of Japanese rule. It is the first in-depth examination of how the Nationalists consolidated their rule over Taiwan even as they collapsed on the mainland. During the 1945-50 period, the Taiwanese experienced disappointment with Nationalist misrule; struggles over decolonization and the Japanese legacy; a violent uprising and brutal government response; and the chaos surrounding Jiang Jieshi's retreat with his mainlander-dominated authoritarian regime. This book, based on archival materials newly available in Taiwan and the United States, shows how the Taiwanese sought to place the island between independence--becoming a sovereign nation--and assimilation into China as a province.