Here is the full list of all 57 Approaching Cao Army achievements.
BossKill
Kill2000
Kill5000
Kill10000
Kill20000
Kill50000
Kill100000
Lv1
Lv2
Lv3
ChenGong
ChengPu
ChenWu
DaQiao
DiaoCan
DongXi
DongZhuo
GanLing
GaoShun
GongSunZan
GuanYu
HuangGai
HuangZhong
JiangWei
JiLing
LiaoHua
LiuBei
LiYan
LuXun
LvBu
MaChao
MaLiang
MengHuo
PangTong
PanZhang
SunCe
SunJian
SunQuan
SunShangXiang
TaiShiCi
WangPing
WeiYan
XiaoQiao
XuSheng
YanYan
YuanShao
YuanShu
ZhangFei
ZhangJiao
ZhangLiang
ZhangRen
ZhangZhao
ZhaoYun
ZhouTai
ZhouYu
ZhuGeLiang
ZhuRong