Manuel & Isaakios Komnenos began military service while their father Ioannes was still alive

Summary:
Manuel and Isaakios Komnenos, eldest sons of Ioannes Komnenos, began their military careers while their father was still alive 
Dates:
1065 
Ioannes Komnenos, father of Alexios I (Ioannes 63)
  • He survived to see his sons Manuel 61 and Isaakios 61 follow him in his military career (:) Bryennios 87.4-6
Isaakios Komnenos, elder brother of Alexios I (Isaakios 61)
  • Followed in his elder brother (Manuel 61)'s steps (:) τοῖς τἀδελφοῦ κατὰ πόδας εἵπετο ἴχνεσιν Bryennios 87.7
Manuel Komnenos, eldest brother of Alexios I (Manuel 61)
  • Started learning about military matters and, eager to emulate his ancestors, strove to become worthy of them, followed by his brother Isaakios 61; this happened while his father Ioannes 63 was still alive (:) στρατεύειν τε ἤρξατο ... πατρὸς ἔτι τούτου περιόντος Bryennios 87.4-6