because europeans were very powerful and we knew the technique of building empires
European nations brought warships and armies to build empires in South Asia.
The European nations rivalries because they wanted to expand their empires colonially. This included all countries.
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Many nations granted freedom to their colonies.
They are based on the arbitrary borders of old European empires
The expansion of the European railroad helped to mobilize supplies and troops.
European nations sought to gain empires in the 19th and early 20th centuries primarily for economic, political, and strategic reasons. Colonies provided access to valuable resources, new markets for industrial goods, and opportunities for investment. Additionally, imperial expansion was driven by national pride and competition among European powers, as empires were seen as a measure of national strength and prestige. Furthermore, the desire to spread culture and religion also motivated many nations during this period.
England, France, Portugal and Spain were all European imperialist nations or empires. England wanted to expand, while Spain and Portugal fought for Africa. France wanted both, along with new places and ideas.
World War II significantly weakened European empires, leading to accelerated decolonization as nations sought independence. The war devastated economies and diminished military capabilities, prompting European powers to reconsider their colonial holdings. Nationalist movements gained momentum in colonized regions, fueled by wartime ideologies of self-determination. By the 1960s, many former colonies had achieved independence, marking the decline of traditional European empires.
European nations competing and building large navies to defend their empires.
Colonies provided raw materials.
By 1939 when Hitler invaded Poland the age of empires was gone. They disappeared afternWW1 because the war had changed society.