User blog comment:PercyJacksonfan12/Titans and Camp Jupiter/@comment-72.193.157.145-20111230024825

In both tLH and SoN, it is mentioned that Jason fought the titan Krios. It is even hinted at in tLO when Nico shows him the titans' meeting in his dream. So yes, I think that the titans in that area probably attacked Camp Jupiter. I honestly don't know if the demigods working for Kronos and the titans knew there were two camps (they probably didnt, or the info would've leaked) but I'm sure the titans did considering one of them battled Camp Jupiter.