Complex sentence: In November of 1956, after many of his colleagues at the newspaper were arrested by French colonial authorities, Alleg went into hiding, maintaining his journalistic connections by continuing to submit pro-independence articles to the French Communist journal L'Humanité.
Split into simpler sentences: In November of 1956, after many of his colleagues at the newspaper were arrested, Alleg went into hiding. However, he continued to submit pro-independence articles to the French Communist journal L'Humanité.