If I understand your question, "with" is not a conjunction, but a preposition. "The war with Germany reaching etc. is not a clause, but a participial phrase.
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SuperESLdo the two examples that I give in my most recent post have the identical structure to the example that you gave and also to the example that I raised in my first post? Or are they apples and oranges?All four are clauses followed by participial phrases which elaborate on the clauses.