Magical Girl Lyrical Nanoha StrikerS

Magical Girl Lyrical Nanoha StrikerS (魔法少女リリカルなのはStrikerS) is a 26 episode anime that aired from April 1 to September 23, 2007. As the third entry in the main Nanoha continuity, it is the sequel to Magical Girl Lyrical Nanoha A's and takes place 4 years after its epilogue, itself set 6 years after the conclusion of the series. The series introduced a new "generation" of characters and shifted its focus from individual rivalries between the main characters to team-based battles and a more wide-ranging conspiracy.

Story
Many years have passed. Hayate, now a Lieutenant Colonel in the Time-Space Administration Bureau, works to create a new unit of elite mages that can react quickly to reports of Lost Logia. To this end she brings in her two closest friends, Nanoha and Fate, and her old subordinates the Wolkenritter to train a new generation. In addition to the challenge of turning the recruits into a capable fighting force, events are moving much faster than anyone could have anticipated and the threat that they are all working so hard to avert may in fact be just around the corner.