The phrase "a more complex mission" is correct and usable in written English.
You can use it when describing a task or objective that involves multiple layers of difficulty or intricacy.
Example: "The team was assigned a more complex mission that required advanced problem-solving skills and collaboration."
Alternatives: "a more intricate task" or "a more challenging objective."
A1 The military's Special Operations Forces, which played a pivotal role in toppling the Taliban government in Afghanistan and in capturing Saddam Hussein, are now grappling with proposals to give them an expanded and more complex mission in the global campaign against terrorism.
The military's Special Operations Forces, which played a pivotal role in toppling the Taliban government in Afghanistan and in capturing Saddam Hussein in Iraq, are now grappling with proposals to give them an expanded and more complex mission in the global campaign against terrorism, senior commanders and top Pentagon officials say.
NASA's almost simultaneous — and far more complex — mission to Mars cost $671 million.
In 1992 The Soviets plan to launch a more complex Mars mission, which they described.
The more complex missions require fast mental arithmetic and can include multiplication and division functions.
Given the problems plaguing the military, some now question Germany's ability to engage in more complex missions even if it wanted to.
As the desired capability of CubeSats increases, and more complex missions are planned, propulsion is required to accomplish the science and engineering objectives.
Although there may exist purely technological or programmatic policy issues, which would suggest such more complex missions to be more attractive, many other aspects, which do not need to be explored in this report, may argue against such a mission model.
The Pentagon is considering sending U.S. troops to fight beside Iraqi soldiers as they take on more complex missions in the battle against Islamic State militants, according to Gen. Martin Dempsey, the nation's top military officer.
On the other hand, teaching hospitals have multiple missions and a more complex organizational structure that may increase the difficulty of coordinating the efforts of clinicians to meet the specific information needs of patients [ 31].
