A 1k general exp is an item in Evony TKR (The King's Return).
The description of 1K General EXP in Evony TKR says:
Grants your General 1,000 EXP.
1K General EXP is known to potentially be obtainable from opening Lv6 Boss Monster Chest and Lv7 Boss Monster Chest. The links for each item are below:
Note: This list may be incomplete.