They use scientific methods such as radiocarbon dating
They make an assumption. They compare it to other historical sources
Senator McCarthy’s influence might have died quickly following his 1950 accusations had it not been for "<span>the arrest of Julius and Ethel Rosenberg for espionage" since this proved that there was at least some truth to McCarthy's accusations. </span>
Answer:The French retired from Madrid. Napoleon then invaded Spain and by 1809 was in control of most of the peninsula
Explanation:
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