The critics thoroughly examined every aspect of the defense plan.
Literal
Critics [topic-は] that defense plan [possessive-の] every aspect [object-を] sufficiently examined.
評論家 means 'critic.' 防衛計画 is 'defense plan.' あらゆる面を十分に検討した means 'thoroughly examined every aspect' — あらゆる ('every, all possible') and 十分に ('sufficiently, thoroughly') intensify 検討する ('to examine, to review').