Alternatives exist. But they would involve preparation and planning and self sacrifice. Spending priorities would need to be shifted to what works, not Buck Rodgers stuff. Munitions for at least a full year's war fighting would have to be stockpiled. and production maintained at those levels. This also would detract from the colonization budget. So more spending on Diplomacy training would be needed. The overall alternative would be self-reliance and living within your own means without having plans for any outside help. HINT - The US is having to relearn this same lesson.
Western-backed Syrian rebels say kill foreign Islamic State (Reuters)
from the article: There's no substitute for Washington