Who am I?
I lived a long successful life I did
Starting out was rough as a kid
I seemed to catch break at age thirty eight
Working under the governor sure was great
In '64 I dethroned a king
Shortly after, a shipyard and naval academy became a thing
My final moments were in '85
Nothing could be done about my demise
Before I left a truce was signed
My legacy lives on for all of mankind
Will add hints if needed
To be fair, the year thing may be very misleading and unfair. So I will tell you not to get too hung up in the 20th century. For all I know denoting a year like '85 can only be referred to the 20th century. So I'll throw this early hint to everyone.
I died at age 72
Hint #3 (Hopefully a good one!)
I was a military leader in the Qing Dynasty