An attacking creature becomes an unblocked creature during the declare blockers step of the combat phase if no creature blocks it.

一个攻击生物在战斗阶段中的“宣告阻挡者步骤”中，如果没有生物阻挡它，它便成为一个未受阻挡的生物。

youdao

During the penalty phase of the trial, many had asked for clemency, saying they were decorated combat veterans who had proven their loyalty to the country.

VOA: standard.2009.12.23

Mr Eliasson said UN peacekeepers would only be deployed after the "combat phase" of the operation was over.

BBC: Mali 'hesitant' over UN peacekeeping force

As a result, one week from tomorrow, the U.S. combat phase of that war will close.

WHITEHOUSE: An Obligation to Those Who Serve

But the bottom line is, is that our combat phase is now over.

WHITEHOUSE: Ending the War, Saluting the Troops