The only changes made were augmentations to their anti-aircraft batteries.

Just after midnight local time, anti-aircraft batteries opened up again.

Throughout the war, both ships saw their anti-aircraft battery changed constantly.

Her anti-aircraft batteries opened up immediately but failed to hit the intruder.

The 75 mm anti-aircraft battery was of the M1922 type.

The unit had orders to supply an anti-aircraft battery in the area.

A 75 mm anti-aircraft battery was located on the island in October 1914.

Eight minutes later, she opened fire with her 3-inch anti-aircraft battery.

Then I ran through the hot snow towards the anti-aircraft battery.

The Ministry said that the area was the only place to put an anti-aircraft battery.