The arrival of a tremendous ship orbiting the planet sounded literal and figurative warning bells in the cockpit of the starfighter. The General was awed by it. It was tremendous, as large as the USS Alaska if not larger! However having no such emotions, AFAI was first in vocalizing his assessment.

“General, I have no information about this ship, however I can infer from its tremendous size and the capabilities our own ships of such size, it is a formidable opponent. I recommend no hostile action, sir.” The General rapidly regained his composure; paralyzing emotions did not befit a profession such as his, and he was ashamed to have even lost these milliseconds. 
“Noted, computer. The ship seems to have not noticed us.” He chuckled, “You know, computers keep advancing and advancing, but they’ll never be good at poker. Open communication on all channels, I have a message for these aliens. While I talk, salt the AMRAAM-43 with some tantalum, rubidium, titanium, lawrencium, any trace elements we happen to have picked up whizzing through space we’ve no use for. Only a few milligrams though, I want this next bit to be a mystery.”

He put on his officer’s cap and a game face, then faced the camera in the cockpit. “Begin transmission. This is Brigadier General Garrett Johnson, United States Air Force. You are in violation of American orbital space, and are harboring a fugitive from justice. You will depart at this instant, or face the consequences. If you cannot understand me, I will send a warning shot to convey my intentions.”
He nosed up at mach 10 and launched the salted AMRAAM vertically, not quite towards but very close to the flagship, around a few miles. 

“The missile headed in your direction Is not locked on to you, but it is carrying the means of your destruction. I do not know how advanced your civilization is, so I will explain the contents. Aboard this missile, the weakest I have, is 10 grams of antimatter. Aboard my others, I have up to a metric ton, all under high pressure. You can see the missiles" This was not an an empty bluff; the missiles had more than enough volume to contain more antimatter, however, 430 kilotons worth was deemed sufficient. "And in my ship, another 20 metric tons, a few hundred gigatons all told, and I have lasers capable of focusing an antimatter annihilation on any of your weakspots as well. And you may get me, and you may get some of my missiles, but one will get through. 

He remotely detonated the missile some 1000 km from the surface of the earth.

“Don’t bother calculating it, that was 430 kilotons exactly. Now, I have been authorized to use all weapons, and unless you leave these people be, so help me God all 20 metric tons are going to detonate in your hull.” 
He altered trajectory towards the moon and engaged cloaking, which optically and to sensors not specifically watching for very faint 1550 nm transmissions, would look like he teleported, possibly behind the moon to launch missiles from safety. The enemy would not get a sneak attack on him. He disabled the common radio frequencies from metamaterial bending for now, so he could hear if they made their response.