Blue, of course.

You throw back the blue pill and pass out You are surrounded by darkness... you look around and realize youre restrained and have some kind of helmet on... panic sets in as you struggle to remember who you are..were? And what your name is...was? Suddenly a figure appears in front of you. Your vision begins to clear as the mans words suddenly pierce throught the fog and enter your mind. "Sire? Are you awake?" "Yes...what happened? Where... who am i? "Sire, we restrained you on the battlefield because you became delusional and violent to your men" "I am ok now squire, release me" your mind starts racing as youre identity oberwhelms you. You stand up from the table and raise your visor. You see...knights armor? "Squire!" You say shocked "who am I?" The young man kneels and says "Why, you are King Arthur sire, wielder of excalibur and leader of the knights of the round table here in Camelot" Stunned but suddenly filled with purpose you head back to the battlefield, with only the memory of the box left from your previous life... [spoiler]red wouldve sent you forward in time, blue sent you back[/spoiler]