Business strategy pertains to a business unit as opposed to the corporation made up of many business units.
Links[1] https://managingresearchlibrary.org/knowledge/blog/lexicon [2] https://managingresearchlibrary.org/about [3] https://managingresearchlibrary.org/glossary/corporate-strategy [4] https://managingresearchlibrary.org/glossary/strategy