I am writing a medieval fantasy story, in which MC has suffered some serious injuries and has lost most of his memories leading up to when we pick up with him. Now, he does have the occasional flashback or dream about his former life, often without proper context to his "current self".
My aim is, that we journey with him and experience his life through his eyes, and to build the world half using present experience/conversation and half using flash-backs and "memories". By build the world I mean discuss recent historic events, introduce key political players and various groups within the world, introduce geographic locations, etc.
The time difference between "then" and "now" as far as the story line goes is roughly 5 years. In which time various changes have occurred in-world, which leads to more confusion for him. These changes are more political and have been directly impacted by the event in which he was injured, and to a lesser degree his actions since.
How can I go about illustrating this difference in time and due to the changes the differences in the world?
This is not a duplicate of my other question. I deliberately separated it into two parts. So that I can sort through a) how to write longer flashback and now b) how to illustrate a time difference in which drastic changes have occurred.
Edit 1 Clarifying:
These changes are more political and have been directly impacted by the event in which he was injured, and to a lesser degree his actions since.
Without giving too much of the plot away (as my goal with this is to get published), he was injured in an event in which the "politcal dynasty" or ruling class was changed. Since recovering and making it on his own he has made choices that have directly impacted the governing bodies (keep in mind medieval fantasy, different kingdoms, serfdoms, etc.) in a way that he is clearly not the same person he was before he got hurt.
As a result the journey we embark on with him is as much a mental one (him trying to make sense of the jumbled mess in his head) as much as a physical quest in which he navigates the world he has inadvertently changed, while coming to terms with who he is, was and which "persona" he will decide to embrace.