Complex sentence: From the end of World War II until 1978, the US government loaned and gave the Communist regime in Poland $677 million; in 1979 it granted an additional $500 million in loans and loan guarantees.
Split into simpler sentences: From the end of World War II until 1978, the US government loaned and gave the Communist regime in Poland $677 million. In 1979, it granted the Communist regime in Poland an additional $500 million in loans and loan guarantees.