обороной

обороной

"Обороной" means "defense" (instrumental case of "оборона").

The word 'обороной' is used as an instrumental case of the noun 'оборона', signifying the means by which the city was defended.

Город удерживался мощной обороной.

The city was defended with a strong defense.

Here, 'обороной' functions as an instrumental case, emphasizing the association with the concept of 'national defense'.

На встрече обсуждали вопросы, связанные с государственнои́ обороной.

The meeting discussed issues related to the state's defense.

In this context, 'обороной' is used to describe the means or method through which a victory was achieved, employing the instrumental case of the noun.

Он гордился победой, достигнутой благодаря хорошо организованной обороной.

He was proud of the victory achieved thanks to the well-organized defense.