Massive sci fi forward space defense base on alien world

A vast, sprawling forward space defense base. There are landing pads with attack space fighters on them ready for launch at any threat. The base is protected by many turrets of laser cannons aimed at the sky ready for use when attacked. The inner part of the space base is teaming with personnel and buildings, radar and time transfer portals used for immediate reinforcements. This is a massive military complex on the edges of enemy space. The plantet is a beautiufl green and lush planet with strange alien trees, rivers and a slight greenish sky with a large moon off the horizon.