 Meanwhile , Captain D. I. A. Green 's B Company of the 2 / 7th Infantry Battalion had captured Posts 26 , 27 and 24 . After Post 24 had been taken , two Matildas arrived and helped to take Post 22 . As the prisoners were rounded up , one shot Green dead , then threw down his rifle and climbed out of the pit smiling broadly . He was immediately thrown back and a Bren gun emptied into him . Lieutenant C. W. Macfarlane , the second @-@ in @-@ command , had to prevent his troops from bayoneting the other prisoners . The incident was witnessed by the Italians at Post 25 some 450 yards ( 410 m ) away , who promptly surrendered . With the help of the Matildas , Macfarlane was able to quickly capture Posts 20 and 23 . At this point , one tank ran out of ammunition ; anti @-@ tank fire already had blown off the track of another in the attack on Post 20 . Nonetheless , Posts 18 and 21 were captured without armoured support , using the now @-@ familiar tactics of grenades , wire cutting and assault . With darkness approaching , Macfarlane attempted to capture Post 16 , but the defenders beat him off . He retired to Post 18 for the night . 
