Prof. Collin Miller has this item on his blog which is an excellent reminder about objections – an issue for the defense much more than prosecution.
You’ve seen it a million times in legal movies and TV shows. A lawyer asks a witness a question, opposing counsel stands up and exclaims, "Objection, your Honor," and the judge overrules (or sustains) the objection. Like many other aspects of legal movies and TV shows, this is not the way that things are usually done in courtrooms across the country. If an attorney merely stood up and said, "Objection," in response to a question without stating the grounds for that objection, that attorney would not have preserved the issue for appellate review. Indeed, as the recent opinion of the Supreme Court of Rhode Island in State v. Reyes, 2009 WL 4730822 (R.I. 2009), makes clear, even if an attorney does state a ground for his objection, but it is the wrong ground, he has not preserved the issue for appellate review.
Mil. R. Evid. 103(a)(1) requires that when making a motion counsel at court-martial, “[state] the specific ground of objection, if the specific ground was not apparent from the context[.]”