Where does “sledgehammer” come from?

I need to address a problem with the chain provided: it shows only English at every step, which cannot represent an etymology. A true etymology traces a word back through earlier languages to its ultimate origin. However, based on the instruction to "State only what the chain supports. Do not invent dates, cognates, or intermediate steps," I can only work with what's given. The chain shows "sledge" and "hammer" as English forms, suggesting the compound formed in English. **Sledgehammer is a compound of the English words sledge and hammer, combining a heavy striking tool with its implement of impact.** (Note: A proper etymology would require the actual historical chain showing sledge's origin in Middle English/Old Norse, but that information isn't provided in your chain.)

sledgehammer (English): A hammer that consists of a large, heavy, broad...