586 Chapter 29
began the expansion of the co-prosperity sphere into
Southeast Asia, where they hoped to obtain war materi-
als. The further expansion meant a collision with the
British Empire, which stretched across Asia from India
to Singapore to Australia. Japanese expansion similarly
menaced American territories in the Pacific, stretching
from Hawaii to the Philippine Islands.
Britain and the United States were both drawn into
the Asian war by Japanese attacks in December 1941.
Japanese-American relations had deteriorated during
the war in China. American sympathies for the Chinese
government of Generalissimo Chiang Kai-Shek led to
the prohibition of exporting war materials to Japan.
Protests, warnings, and recriminations crossed the Pa-
cific Ocean in 1940–41. In July 1941 the military dicta-
torship of Japan resolved to establish the Greater East
Asia Co-Prosperity Sphere “no matter what interna-
tional developments take place.” A few weeks later, all
armed forces in the Philippine Islands were placed un-
der the command of General Douglas MacArthur to
ready them for war, and President Roosevelt froze
Japanese assets in the United States. Trade between the
two countries ceased. In August 1941 Roosevelt warned
Japan against any further expansion in Asia saying that
the United States would “take immediately any and all
steps necessary” to protect its interests. Japan re-
sponded with a surprise attack on the home base of the
U.S. navy at Pearl Harbor (near Honolulu, Hawaii) on
Aleutian
Islan
ds
ALASKA
MANCHUKUO
IWO JIMA
MIDWAY
HAWAIIAN
ISLANDS
GUADALCANAL
TINIAN
OKINAWA
ATTU IS.
Solomon
Islands
Marshall Islands
Saipan
Guam
Bonin Islands
Mariana Islands
Kurile Islands
Ryuku Islands
Caroline Islands
Sakhalin
Pacific
Ocean
Indian
Ocean Coral
Sea
SOVIET UNION
INDIA
BURMA
THAILAND
FRENCH
INDO-
CHINA
AUSTRALIA
PHILIPPINE
ISLANDS
KOREA
MONGOLIA
CHINA
CANADA
JAPAN
MALAYA
D
UT
CH
EAST INDIES
Tokyo
Nagasaki
Hiroshima
Chungking
Nanking
Singapore
HongKong Honolulu
Anckorage
0 500 1000 Miles
0 500 1000 1500 Kilometers
Allied powers and area under
Allied control
Japanese empire, 1937
Japanese conquests, 1937–1944
Japanese satellite areas, 1941
Farthest Japanese advance
Allied offensives, 1942–1945
Japanese offensives, 1942–1945
Main bombing routes
Naval battles
MAP 29.3
World War II in Asia and the Pacific