Answer:
2 1 4 5 3
Step-by-step explanation:
Evere since the mid-19th century and Commodore Perry's sailing into Tokyo Bay, the Japanese were aware of their military and economic inferiority comparing to US. They started reforms, industrialization and modernization of the country which was done by the end of the century.
However, this process required lot of resources, metals, steel, oil etc. which Japanese islands were lacking on. In the 20th century began their expansion on neighboring countries, but only the events from 1930s provoked answer from Western countries. Annexation of Manchuria and war with China led to halt of resource shipments to Japan.
Deprived of oil and other resources (80% of Japan's oil arrived from the US), Japan needed to expand further but was aware that it wasn't possible as long US had influence over the region.
Although negotiations and diplomatic meetings were taking place to resolve such a conflicting situation, the Japanese were secretly planning to reduse US's influence in the South-East Pacific.
In Decembar 1941. they launched a surprise attack on Pearl Harbor, American military base in Hawaii, killing over 2000 people.
Since this attack happened surprisingly, without any previous declaration of war, it caused immediate reaction from the USA, resulting in declaring war on Japan and joining the WW2 on the side od Allied Powers.