"Tiểu đoàn của chúng tôi sẽ cố thủ."

Translation: Our battalion will stand our ground.

[dtUyaD]

"stand its ground" not "stand our ground" (this is a select from the words provided exercise)

[GrahamRawlinson]

No, stand its ground, not our ground. We stand our ground.

[JanetHoski1]

The only correct one is "our battalion will stand its ground". The subject is the battalion, not us.

[Dan553966]

Around here it would be understood but not likely said.

[Venice967419]

The battalion is a singular thing, not a plural. We stand our ground, IT stands it's ground