Step 1: Understanding the Concept:
Wine classification is based on vinification technique, carbon dioxide content, and alcohol fortification.
Step 2: Detailed Explanation:
Fortified wines are wines to which a distilled grape spirit (typically neutral grape brandy) is added either during or after alcoholic fermentation.
This fortification increases the total alcohol content to $15\text{--}22\%$ ABV and halts yeast fermentation (retaining natural residual sugar in sweet fortified wines).
Classic examples include Port, Sherry, Madeira, and Marsala.
Step 3: Final Answer:
Hence, wines with added brandy are termed fortified wines.