The invasion has proved more expensive than he had foreseen.

He reminded Americans that if an invasion had proved necessary, up to a million American servicemen would have died.

At sea the invasion proved a significant setback.

The twin invasion was proving a logistical nightmare for Connavar and his generals.

If the invasion had proved to be an equipment-consuming slugfest lasting through March, the total would have been $60 billion.

The secret invasion proved to be one of the worst-kept secrets in America.

The invasion of Provence proved to be a quiet and quick operation.

In the end Edward's invasion in 1303, by far the strongest since 1296, proved too strong to resist.

But the next Chinese invasion proved to be the largest yet-50,000 strong, and caught the Burmese command by surprise.

Lee's second invasion of the North, however, proved disastrous.