When in history do we first have record of steel being used as a material? I am also interested in both its initial purpose and when it was first used in weapon making.
What language(s) were considered the primary language for the Holy Roman Empire? Were there many different languages spoken due to the many different regions?
What factors related to the Eastern Crisis contributed to the outbreak of World War 1? The Eastern Crisis pertains to problems posed by the decay of the Ottoman Empire. Primary among these problems ...
For writing a story set in Napoleonic Wars era, how should one use the currencies accurately? I read in novels they use currencies like shilling, pound, guinea, sovereign, four (or six-, etc) pence, ...