Hecuba, are you sure you read correctly? The sentence that started 'Civil War [sic] broke out ...'? Of course 'civil' is capitalized as the first word in the sentence, but there's no reason to capitalize 'war' as well, because the article 'the,' which would make it the proper name of a particular war, is not in the sentence. 'The Civil War broke out' would of course have been correct, but in that sentence, there isn't any 'the.'
civil war (= a state of armed conflict within one country)
People are worried now that civil war may break out in Ukraine.
The conflict started as a civil war and spread to neighboring countries.
Abraham Lincoln was worried that civil war would tear the country apart.
The conflict between Charles I and parliament soon led to civil war.
the Civil War (= a particular conflict in [American or English] history)
Abraham Lincoln was worried that the [American] Civil War would tear the country apart.
The conflict between Charles I and the parliament soon led to the [English] Civil War.
Of course at this point in my life I understand that each country's own civil war is the only one that matters to that country, the one that can be mentioned without an identifying nationality like American, English, or indeed Spanish. But back when we learned history in school, our own Civil War was the only one taught at all -- the one with Cromwell in England was far more distant and had much less influence on our own history, so that we only encountered it in a paragraph or two in passing, or perhaps in college in a more specialized context. And that's still sort of my mental default, so it's still a little surprising to me -- or, yes, amusing -- to come across the 'other' Civil War, even though I know what it is. (-:
Never mind, none of that is very relevant here, since EY knows what she's doing anyway about the Spanish one. It's just that there are clear rules about capitalizing proper nouns in English, so I hated to leave confusing examples for any German learners reading along.