[a][4] Allied with Odo II, Count of Blois, he fought against the kings Hugh Capet and Robert II of France, but he was forced to acknowledge the Count of Anjou as his suzerain.

During the siege of Tillières, Hugh narrowly escaped from the Norman forces pursuing him by disguising himself as a local shepherd.

[5] Throughout the tenth century the dynasty of counts of Maine, of which Hugh III, his father Hugh II, and grandfather Hugh I were all members struggled to control both the city of Le Mans and church investitures[6] and in that effort were in near constant warfare with the Bishops of Le Mans, notably Segenfridus and Avesgaudus.

[7] Between 995 and 1015 Hugh III donated several properties including four vineyards and three mills in Le Mans to the monks of Mont Saint-Michel In Normandy.

[8] When approached by Abbot Hildebert in 1014 in requesting more land in the area of Le Mans, Hugh III generously gave the land of Voivres and personally placed the offering on the altar at Mont Saint-Michel.