Answer:
Economic, Environmental and political.
Explanation:
Permanent move from one country to another due to various reasons is called migration. Throughout history people has moved from one place to another to explore their world. Migration has impacted world culture since its beginning.
There are three main causes for migration, It falls into three categories: Economic, Environmental and political. While speaking of migrations experts talk about push and pull factors.
The factors that push people out of an area are called push factors while the factors that pull people toward an area is called pull factor. Ex. while talking about the environment lack/depletion of natural resources can be a push factor while availability of land at some other place can be a pull factor.
They belong to the state court system
archduke Franz Ferdinand got assassinated, and all his allies attacked the country where the assassins were from, and then all of those countries allies attacked the allies of the countries attacking their ally, and then there was trench warfare in Europe, first tanks came around, poison gas was used and was very deadly, and in the end Germany got their butt kicked
The helots were slaves and they were also mercenaries, so they fought for the Spartans, usually against Persia and Athens.
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