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.
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.
Trinidad was a colony of Britain in World War One, so technically, Britain's enemies would have been its enemies also.
They didn't take over any countries. Germany, Italy and Austria-Hungary did but in the end Britain, France and Russia won the war so Britain didn't need to take over any countries.
Whats a Country?
germany
Great Britain
Several of the foreign fighters were from countries that had been over run by the Germans, so any of the military that escaped capture went to Britain to continue the war and reclaim their country. Of the others, they were from countries not involved in the war, but they went to Britain to fight for a cause they believed in.
which war?
Trinidad was a colony of Britain in World War One, so technically, Britain's enemies would have been its enemies also.
France and Britain had been in a war before so they know what could happen if another war broke out! Also they were the bigger more dominent countries so they had more power over the other countries!!
Britain invaded most of the world by sending troops to claim lands and start war. It has been determined that there are only 22 countries in the world that Britain did not invade.
britain
They didn't take over any countries. Germany, Italy and Austria-Hungary did but in the end Britain, France and Russia won the war so Britain didn't need to take over any countries.
Great Britain and the United States.
Spain and Britain
All the countries of the Empire and the United States.
Britain and France
There were many countries that were controlled by Great Britain at the beginning of World War 1.