come to (one's) attention
To be noticed by one; to enter one's awareness. In this usage, a noun or pronoun is used between "to" and "attention." Once the employee's complaint of mistreatment came to my attention, I knew I had to address it right away.
come to attention
Of military personnel, to stand at attention (which, in most cases, means looking forward and standing erect with one's arms at one's sides). When they heard the drill sergeant's call, the troops abruptly stopped marching and came to attention.
come to someone's attention
and come to someone's noticeto be told to, revealed to, or discovered by someone. It has come to my attention that you are not following the rules. Your comments have just come to my notice.
come to attention
to assume a formal military posture, standing very straight. Almost immediately, the soldiers came to attention.