In the sentence "the volunteers were always willing to step into breach and offer assistance to the tornado victims," the phrase "step into breach" can be understood through context clues.
"Step into" suggests taking action or filling a role, while "breach" implies a gap, opening, or a need that must be addressed. Together, "step into breach" means to take on a responsibility or fill a void when help is needed.
In this context, it indicates that the volunteers were eager to offer their support and assistance during a time of crisis, stepping up to help those affected by the tornado.