Use "fall back upon" in a sentence

1. I must fall back upon what I said previously.

2. ‘Europe's surplus will not always have America or India to fall back upon, and the Britisher cannot very well assimilate with the other inhabitants of Asia.’ ‘Gandhiji wanted to show the Britishers that an Indian was capable of manufacturing modern medicine at lower price, and that Indians too were as enterprising as Britishers and other