User blog comment:Echo 1/UNSC Weaponry seems unrealistic/@comment-1430336-20100716023543

Per Above

Things do tend to be created after an occurence. Look at Transformers. After they came, the humans were able to develop a rail gun that killed devastator in one hit. And they only developed that after they came. But that might not be a good example.

But you must see that weapons are created during conflicts. They be developing weapons beforehand but it usually at a very small pace. During war, weapon research is significantly faster