The phrase "successful attack" means when someone or something is able to harm or defeat their target as planned, achieving their goal. Full definition
The story revolves around terrorism, and it features a few failed and successful attacks on American soil. (markreviewsmovies.com)
That goal suggests that we can set up the side in a manner that such kinds of successful attacks can be realized more often than not. (justarsenal.com)
In addition, the character movements aren't very smooth and the attack animations take too long to complete leaving you open to successful attacks from enemies. (thatvideogameblog.com)