Details can be found within the War Diaries on the website at 70 Brigade where the disaster is described.
The impact was felt throughout County Durham and can be seen on village and town War Memorials throughout the County.
Their sacrifice - which is what it was - was not in vain, as the German advance was slowed by at least five hours - allowing more men in other units to escape towards Dunkirk.
- any queries can be forwarded to 70brigade@newmp.org.uk