In my view every single country in the world apart from the following:
Burundi,Cape Verde,Dominican Republic,French Southern Territories,Guinea-Bissau
Macedonia,Northern Mariana Islands,Sao Tome And Principe,United States Minor Outlying Islands,Western Sahara.
This is an indirect answer however, since this does take into account the following:
1) previous sovereignty by third parties of land now sovereign itself.
2)attempted seizures
3)established bases
4)engagements within territories against third parties.
5)wars of independence against third parties backed by the government.
6)dominions, condominiums, colonies, mandates, occupations,invasions,civil wars,conflicts,dependencies,discovery naming and exploration,raids,indirect invasion by association, low intensity war,NATO actions,protectorates, peacekeeping,declarations of war,territories,gunboat diplomacy.Revolutionary support acts, militarily aided humanitarian aid,rescue missions and claims.
7)arguable incidences of informal empire by preference of trade, investment, property and industry backed by military assistance or threat.
8)Major incidents not resulting in war but with diplomatic victory.
9)Territories by association.
10) wars as England prior to 1707.
The reason I have listed all of these is that native populations,lands, third parties, sovereignty or economies have all at one time or another been directly or indirectly affected by these "actions".
Perhaps this is not a very good answer but there we are.
The main countries that Germany declared war on are: England, France and Poland.
England
No, there have been many civil wars in various countries around the world, but World War 2 was not a civil war.
Revoultionary war: france war of 1812: no one world war 1: france, england, world war 2: france, england, italy, and russia
123 countries involved in the war
England has been at war with most countries at some time.
Australia England and New Zealand
18
It saved England from war and uneasiness between England and Spain. It meant the countries had a truce and many citizens could relax.
England and France
Only England
The main countries that Germany declared war on are: England, France and Poland.
There are very few countries that have not been involved in a war of any type (foreign or civil). One of these countries is Zimbabwe in Africa.
There has never been a war between America and England.
There has been no civil war in England whilst a queen has been on the English throne.
really it depends what civil war your talking about as there has been many in many different countries.
The Hundred Years war was responsible for the establishment of strong central monarchies in France and England.