Hurr ibn Yazid

Al-Hurr ibn Yazid bin Najiyah Al-Tamimi Al-Yarbuʿi Ar-Riyahi ( حر بن یزید بن الناجیة التمیمي الیربوعي الریاحي‎) was the general of the Ummayad army dispatched from Kufa, Iraq to intercept al-Husayn ibn Ali ibn Abu Talib. The newly appointed governor of Kufa, Ubayd Allah ibn Ziyad, issued the command to guard all entrances and exits to Kufa in order to intercept al-Husayn for an oath of allegiance to Yazid ibn Mu'awiya ibn Abu Sufyan of the Ummayad dynasty. Al-Hurr ibn Yazid al-Tamimi al-Yarbu'i was ordered along with his 1,000 soldiers to sanction al-Husayn and his followers and bring them to Kufa.

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Amina Inloes, Amina Inloes is originally from the US and has a PhD in Islamic Studies from the University of Exeter on Shi'a hadith. She is the program leader for the MA Islamic Studies program at the... Answered 4 months ago

There is not much biographical information available about Hurr al-Riyahi (and if someone presents a detailed biography with previously unheard-of information, you should question where they got it from and whether they got it from reliable sources).

This webpage is well-written and explains what is known about the background of Hazrat Hurr as well as the reliability of various reports about him: http://en.wikishia.net/view/Al-Hurr_b._Yazid_al-Riyahi

The webpage does not speculate on his age but given his military rank and position, the respect he was given, the maturity with which he conducted himself, and that he was said to have adult sons (whether or not that report is correct), I would guess that he was somewhere in mid-life, old enough to have passed the younger stages of life but not so old that he was weak or showing signs of aging. 
 

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Sayyed Mohammad Al-Musawi, Sayyed Mohammad al-Musawi is originally from Iraq and heads up the World Ahlul Bayt Islamic League in London. Other than being involved in various humanitarian projects, he frequently responds to... Answered 10 months ago

We believe that every act of the Infallible is based on the  complete wisdom which may not be available to us as our thinking is limited.

The wisdom behind the way of fighting the enemies in Karbala can be to avoid immediate collapse of the camp of Imam Husain (AS) looking at huge numbers of the enemies facing small number of believers.

It can be also to give more chances to the army of the enemies to reconsider their stand.

After all, the whole wisdom of that arrangements is with Imam Husain (AS) which aims definitely to serve the noble aims of Islam.

Wassalam.