go around the flank of (an opposing army)
get the better of;
"the goal was to best the competition"
- It must have been possible to outflank them in some way.
- He was totally outflanked in the debate.
Outflanking the enemy, and riding round towards their rear.出自： Bosworth Smith
To outflank the party, some opposition groups may..move further to the right.出自：Japan Times