Can a country attack another country?

On a legal level most times no. The UN generally prohibits war unless a mandate is given, making most american wars, for example the Intervention in Syria illegal and a violation of international law.

What’s it called when a country takes over another country?

Imperialism is a policy or ideology of extending the rule over peoples and other countries, for extending political and economic access, power and control, often through employing hard power, especially military force, but also soft power.

What does it mean to declare war on another country?

A declaration of war announces to third parties that a very dangerous situation is approaching and they may wish to leave either or both countries for the duration. A (-n ideal) declaration of war will specify conditions under which hostility will cease. (See casus belli.)

What are the advantages of a declaration of war?

A declaration of war allows the recipient to surrender before interrupting both economies to form armies for invasion and defense. A declaration of war establishes basis for closing borders, ceasing trade with the recipient, and expelling opposing citizens. It provides legal penalties for those who continue such trade or harbor such citizens.

Why can’t I organize attacks before I declare war?

From what I remember of HoI2 is that you couldn’t organize attacks before you declared war which means you have pause and get everything setup only after you declare war. It was more of a problem in HoI1 when your units had to move before they go into the province and fought the battle.

Why didn’t WW2 have a Dow before combat?

The official DOW before combat was initiated was actually a rarity in WW2. Germany delivered just one, to the USA. One reason for a surprise attack would be to have nations of general alliances not automatically go to war with countries that they are not directly fighting…though this could be implemented by changing alliance settings also.