Conception section Antiquity is vague and we don t have to refer all the way back to the stone age to make the point Like you have I prefer to use actual but not specific examples so I ll be restoring the Viking statement It s a good intro sentence for the section it s definitive enough and adds color to the section while we can keep the important points you ve introduced regarding practicality of heavy iron armor per steam power Also do we need more than two modern examples The Vikings example refers to no particular ship or war as this is the Monitor article I thought mentioning the French experimenting with Armor during the Napoleonic era not a particular war or battle was specific enough We need to trim one or both of the specific war and battle examples with specific dates and links i e Your British referral is good