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I'm trying to figure out what こうなれば/こうなりゃ means in the sentence

> 仲間を呼ばれた！こう[なりゃ](https://japanese.stackexchange.com/questions/27369/what-
> does-the-
> phrase-%E3%81%93%E3%81%86%E3%81%AA%E3%82%8A%E3%82%83-mean)一匹ずつ潰[していく](https://japanese.stackexchange.com/questions/676/difference-
> between-%E3%81%A6%E3%81%84%E3%81%8F-and-%E3%81%A6%E3%81%8F%E3%82%8B)までだ。

[なれば](https://dictionary.goo.ne.jp/jn/165518/meaning/m0u/) ＝ それだから。したがって。

The Google fish says こうなれば ＝ "in this way," but it seems like it should be
translated as "thus," or more literally, "if it has become so".

> They've managed to call their friends! Thus, I will continue to smash them
> one by one (beginning now until some future point in time).

Is こうなれば interchangeable with
[こうなったら](https://ejje.weblio.jp/sentence/content/%E3%81%93%E3%81%86%E3%81%AA%E3%81%A3%E3%81%9F%E3%82%89)?
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grammar translation conditionals
How to translate 「こうなれば」
On its own it means "In that case", or "if that happens", or something along
those lines.

Your quote seems incomplete or incoherent to me.
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2018-05-18T08:01:51.440
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Yes, こうなれば is interchangeable with こうなったら. They can mean about both "future
events" and "what has happened".
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> 仲間を呼ばれた！ **こうなりゃ** 一匹ずつ潰していくまでだ。

Here the こうなりゃ (contracted way of saying こうなれば) means "Now that it has come to
this" "Now that things have come to this", and can be rephrased as
「こうなったら」「こうなったからには」 or 「こうなった以上は」.

> (beginning now until some future point in time)

The 「Vまでだ」 here is not "until" but "only" "just" "and nothing more" or "all I
have to do is~~", close to 「Vまでのことだ」「Vだけのことだ」.

> "Now that it's come to this, all I've got to do is smash them one by one."
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