When he has penetrated into hostile territory, but to no great distance, it is facile ground.

The Snake class vessels relied on stealth to penetrate into Japanese territory.

Though the town withstood the assault, the natives had demonstrated their ability to penetrate deep into colonial territory.

They have also gradually penetrated deeper into Pakistani territory.

Personnel were heavily involved in field operations, often penetrating deep into Japanese-held territory in one or two man teams.

In the coming decade, Sassanid forces penetrated deeper into Byzantine territory.

Israeli troops and bulldozers had penetrated at least 300 yards into Palestinian-controlled territory to clear land as they repaired the fence.

The Chinese penetrated 15-20 km into Vietnamese territory at most, but the price of human life and equipment were very high.

Penetrating deep into enemy-held territory, the fleet was subjected to extensive kamikaze attacks.

Subsequent information tends to show that a German force has penetrated still further into Belgian territory.