The midfielder reacted badly to a late challenge from counterpart Matt Smith, squaring up to the City player and pushing him to the ground.
In the ensuing fracas the City defender Tyreke Wilson ran to the centre circle to confront Wilshere, the two players grappling each other round the neck before team-mates became involved in shoving and tempers boiled over.
US, S. Korea starting computer-simulated exercises amid N. Korean threat
North Korea is a useful buffer state for China between it and USA forces based in South Korea, and also across the sea in Japan. North and South Korea are still technically at war with the North after the Korean War ended with a truce, not a peace treaty.
Wilshere, who spent last season on loan with Bournemouth, is making his latest comeback from a fractured leg and has played twice for the Under-23s.
After the situation calmed down, the referee showed reds to both Wilshere and Wilson as the north London club eventually held on to win 4-3.
"Well, that was eventful", he wrote on his Instagram account.
US, South Korea Seem to Scale Back War Games
Itis believed the exercises will involve around 17,5000 United States troops mostly involved in the simulation side of the drills. His remark seemed to refer to the planned military drills between Seoul and Washington.
Wilshere has just one year remaining on his contract, and the 2017/18 season could be his make-or-break year after an Arsenal career that has been blighted by injuries so far.
Although Wilshere won't be suspended for any senior matches as a result, it does cast some doubt on whether he is ready to step back into Arsene Wenger's first team in the coming weeks.
Manager Arsene Wenger, however, has claimed that the two-time FA Cup victor still remains part of his first-team plans.
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Wenger is clearly an admirer and you can only hope the teenager gets plenty of opportunity to showcase his obvious talents in the cup competitions and Europa League.