Facts:   - issue: robert de vere , 9th earl of oxford    - caption: hedingham of oxford castle , essex , seat of the earls    - mother: maud de badlesmere    - spouse: maud de ufford    - death date: 12 & ndash ; 18 september 1371      - father: john de vere , 7th earl of oxford    - birth date: c. 1335    - name: thomas de vere , 8th earl of oxford    - image: snowykeepsm.jpg    - death place: great bentley , essex   Based on these bullet points, write a short biography describing the life of thomas de vere , 8th earl of oxford .
thomas de vere , 8th earl of oxford -lrb- c. 1336 -- september 1371 -rrb- was the second but first surviving son of john de vere , 7th earl of oxford , and maud de badlesmere .he was predeceased by his elder brother , sir john vere of whitchurch , buckinghamshire , who married elizabeth de courtenay , the daughter of hugh de courtenay , 10th earl of devon , and died before 23 june 1350 without issue .thomas took part in several of the military campaigns of edward iii .he married , probably about 24 july 1341 , maud de ufford , daughter and heir of sir ralph de ufford and maud of lancaster , the daughter of henry of lancaster , grandson of king henry iii .after thomas 's death , his widow was indicted for involvement in a plot against king henry iv , but was later pardoned .when thomas died in 1371 , he was succeeded by his only son , robert de vere , 9th earl of oxford .