In OTL the Portuguese army was ordered to fight to the death during the indian invasion of Goa, but since their situation was absolutely hopeless (about 4 thousand portuguese garrison troops) against over 40 thousand indians, they surrendered after the minimal combat possible.
What kind of resistence can portugal make on this situation? What if they adopt a stance of "bringing the enemy with them" by holding position and causing as much damage possible before being overrun?