Lǎo zhànshì men huíyì qǐ nàduàn zhēngróngsuìyuè, gǎnkǎiwànqiān.
The old soldiers looked back on those eventful years with deep emotion.
Tips
usage
Reverent and nostalgic tone - usually reserved for wartime, revolutionary, or other formative and dramatic periods. Don't apply to ordinary stretches of time.
memory
峥嵘 originally described towering, craggy peaks; applied to 岁月 (time), the image is of years that rise sharply and leave a mark - not flat or unremarkable.