Translation of "Tack" in Spanish

We have to understand that trying to take the humanitarian tack with them isn't going

Tenemos que entender que tratando de tomar el rumbo humanitario con ellos no va

But back across the river, Subotai changes tack and quickly sets his new plan into motion.

Pero al otro lado del río, Subotai cambia el rumbo y rapidamente pone en marcha su nuevo plan.