"Bill Haponski" <haponski@seacove.net> was a former S3 and XO ofthe Blackhorse when he assumed command of the 1/4 Cav in the Spring of 1969.  He wrote: 

The S-3 logs reveal the following:

On 17 March, the last day before the operation, task organization was as follows:

    1/4 Cav (opcon to 2d Brigade, Di An):
    D/2-16 Infantry (straight-leg)
    A/1-4 (-) 1st and 3rd Plts, 2d location unknown
    B/1-4
    C/1-4 (-) 1st and 3rd Plts, 2d location unknown