This is the 9453rd most frequent Japanese word.
立ち上がれ
"Stand up" or "Rise up."
Here, "立ち上がれた" means that he faced and overcame challenges, implying courage and resilience in difficult conditions.
彼は困難に立ち上がれた。
He stood up to the difficulties.
In this context, "立ち上がれ" means to start up, referring to restarting a device like a computer.
コンピュータが故障したので、もう一度立ち上がれ。
The computer malfunctioned, so start it up again.
Here, "立ち上がれ" is a motivational call to action, suggesting unity and action towards a common goal.