Simplify the following text for a Grade 12 native English-speaking person.
Original: The German authorities had realized that their only remaining chance of victory was to defeat the Allies before the overwhelming human and matÃ riel resources of the United States could be deployed .
Simplified: The Germans had realized that their only remaining chance of victory was to defeat the Allies before the overwhelming human and matÃ riel resources of the United States could be deployed .