He held fast by the Triple Alliance, for he saw in this the surest bulwark of peace.
The fortress was an important bulwark against English invasion, and the town - which was created a royal burgh by David II.
As a bulwark against the Spanish, the colony was successful, but as an economic experiment it was a failure.
This charter became the model for other provinces and the bulwark of the liberties of the Netherlands.
Syracuse was for fifty years, not only, as of old, the bulwark of Europe, but the bulwark of Christendom.