The phrase "action culminated" is correct and usable in written English.
It can be used to describe the point at which an action reaches its highest point or conclusion.
Example: "The investigation was lengthy, but the action culminated in a significant breakthrough."
Alternatives: "action reached its peak" or "action concluded."
This action culminated on May 19, when troops took the protesters' camp by force and arrested the red-shirt leaders.
And Monday's civil disobedience action culminated eight days of protests including those organized under the Democracy Spring banner, with over 1,300 arrests total.
Led by Martin Luther King, Jr., James Bevel, Fred Shuttlesworth and others, the campaign of nonviolent direct action culminated in widely publicized confrontations between young black students and white civic authorities, and eventually led the municipal government to change the city's discrimination laws.
This legal action culminated in a consent decree, with the FDA agreeing in 2013 to finalize the monograph, at least with respect to TCS.
The speed with which Janacek disposes of the action, culminating in Katya's suicide, is breathtaking, yet achieved without skimping.
The action culminates on Halloween, when we learn that the title is not a noun phrase but a complete sentence.
The action culminates in a tangle of bad guys and intrigue that would leave even the most paranoid K.G.B. agent scratching his head.
The action culminates a lengthy debate between the Obama administration and for-profit college leaders and includes several concessions to the industry meant to soften the regulatory impact.
Here is where the central argument is animated by action, culminating in an ending more heart-wrenching and morally muddled than can exist in a neatly packaged television episode.
The action culminates in Nielsen's stage routine with her theatrical heartthrob, an apache dance of a still stunning erotic audacity, which Gad, also apparently stunned, filmed in a single, hypnotic three-minute take.
However, this week he has given numerous hints on social media that he would be able to return to action, culminating in a post on Friday that appeared to show the inside of a private plane along with various emojis depicting a US flag, a thumbs-up symbol and a golf flag.
