"Fortune Favors the Bold."
Custer was bold.
He had courage.
Any Army leadership course one attends will have this painted on a wall somewhere-
"Even a poorly conceived plan, executed with vigor and determination, is far more likely to succeed than taking no decisive action." (many slight variants exist)
Again, Fortune Favors the Bold.
I also believe he was such an arrogant narcissist (translation= he was 'bout haf nuts) that he believed he was immortal and destined to be President of the US after he pacified the plains.
No doubt he was brilliant in the CW, but show me a strategy he wrote. He simply engaged. He hit hard and fast.
Fortune favors the bold......
He did stop Stuart at Gettysburg, and lost more men than any other union Cav unit in the battle.
Fortune favors the bold.
At the LBH, he DID quickly devise a strategy. A very poor one.
His troops and horses were exhausted, hungry, and thirsty. The Crow scouts said it was the biggest village they had ever seen, with the biggest pony herd they had ever seen. He ignored them, and almost every one deserted rather than ride into certain annihilation with him. He did no recon, and did not assess the field after totally ignoring the intel he had.
Fortune favors the bold.
So, he simply divided his command, sending Reno straight in, and PROMISED to support him.
He then changed his mind and decided to flank the village and hit the rear while they were looking at Reno.
So, he willingly engaged a massively overwhelming force (the scout intel) with exhausted and hungry men and horses and no real strategy other than to hit and hit hard and fast like he had always done.
Fortune did NOT favor the bold that day.
It can be argued that he had disobeyed Terry's orders to wait for Terry before attacking.
Look at his actions on the Wash-ita. A rather useless massacre, and he left the field without even trying to determine the fate of Elliot and about 20 troopers. He also reported a phony body count.
Did you know he was court-martialed for being AWOL because he took off when he missed his wife?
I won't even get into his publicized political exploits and insubordination to Grant.
True, officers in the 7th seemed to be sharply divided into two groups-
>sycophants who worshiped him, thinking he might become the POTUS. (I feel the brass coming to me!)
>the rest who despised, hated, or reviled him to various degrees because of the events at the Wash-ita and his hunger for adoration and glory.
If I met him in person, I suspect I'd be ready to depart from him forever or just shoot him inside of 30 minutes. More likely 15 minutes.
He was a despicable fool who finally met his destiny.

The tragedy is that he took well over 200 troops with him.