Complex sentence: Even Greengold's superiors were deceived; as the fighting wore on, he did not dare report how weak he actually was over the radio for fear it would be intercepted; at best he could only hint "the situation isn't good".
Split into simpler sentences: Even Greengold's superiors were deceived; as the fighting wore on, he did not dare report how weak he actually was over the radio for fear it would be intercepted. At best he could only hint "the situation isn't good".