hubieran escalado
-they/you had climbed
Past perfect subjunctiveellos/ellas/ustedesconjugation ofescalar.

escalar

Por algún tiempo hemos monitoreado vuestras actividades, y hemos detenido muchas acciones que hubieran escalado en una guerra total.
We have for some time monitored your activities, and stopped any action that would have escalated into an all out war.
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to boo