In the most friendly and conciliatory manner
To conquer more territory
In an effort to discourage Japanese militarism, Western powers including Australia, the United States, Britain, and the Dutch government in exile, which controlled the petroleum-rich Dutch East Indies, stopped selling iron ore, steel and oil to Japan, denying it the raw materials needed to continue its activities in China and French Indochina.
Medical technology to treat malaria allowed Europeans to more successful colonize tropical areas during 1800s. During 1800s European considered malaria as a massive treat to their plan to colonize west Africa. The discovery for a medicine for malaria enabled European to colonize west Africa..