All well and good to say that but the NCR is hardly in a strong position itself, under-equipped and trained soldiers and certainly out-numbered by the Legion at the Dam.
That's my point exactly. Oliver
let the NCR get outnumbered by Legion at the dam rather than taking the fight to them and seizing the initiative.
Also, don't make the mistake of assuming all the NCR troops are untrained and under-equipped. Certainly, all the NCR troops we actually see in the game are equipped with standardized body armor and a service rifle (or shotgun in some cases.) The only thing we've heard about NCR troops being underequipped is that one merchant at the 188, and her viewpoint is pretty limited.
As for undertraining, look at the Misfits - they're called that precisely
because they're undertrained. Which means that being undertrained is an exceptional state in the NCR army, since otherwise they wouldn't be misfits.
But anyway, letting the Legion mass their strength and undertake various means of weakening your defense while you turtle up is a terrible strategy, and one that can be dropped almost entirely on Oliver's lap.
The NCR was in no position to launch a counter-offensive either immediately or even later after the 1st Battle, a lot of dead soldiers, even four years later equipment shortages, poorly trained infantry because they don't have enough period; there was nothing left to bleed after the first battle, they are still recovering.
There's been several years since the first battle, and there wouldn't *be* equipment shortages if Oliver wasn't pissing away his troops reacting to the Legion rather than the other way around.
He is ambitious of the Ranger's fame but I don't think he wants them all to get killed, he positions them on the frontlines as opposed to the rear correct?
He does that explicitly so they can get killed (according to Hanlon), when they should be hanging back and using their superior gunnery skills to snipe Legion officers while NCR grunts hold the line.
Chief Hanlon thinks that telling everyone one of the Ranger Stations has a tamed Deathclaw is a good tactic, "good for moral" you might say but makes supplying those camps logistically a little but puzzling don't you think? One of them get's extra ammo for example and another first-aid because of Hanlon's "reports".
Hanlon's actions were designed to undermine the Dam's defense because he believes holding it is a waste of lives. Also, he doesn't say the NCR has trained deathclaws, he ways the
Legion has trained deathclaws. As well as super mutant legionnaires. He's trying to kill NCR morale and generally confuse things in order to ensure a Legion victory.
He explicitly says as much when you confront him about it.