formidable defenses

As Jeanne gazed on these formidable defenses she could not but wonder how the transport had escaped destruction.

He occupied only the inner line of its formidable defenses, but so strengthened them as to make the place practically impregnable.

Kazu suggested pushing on at once, but Baker did not think it wise to approach the formidable defenses of Singapore by night.

No soldiers during the war faced more difficulties or confronted more formidable defenses.

Almost the whole force of Canada still mustered behind the formidable defenses of Quebec.