The image is a tweet. A woman, Şürle, is pictured with a message in Turkish. The joke, in Turkish, is a sarcastic and critical comment about the historical narrative often presented, and the way some people perceive history. The tweet essentially says: "I think that knowledge of history is innate in men. They seem to think they took part in all wars alongside Atatürk (the founder of modern Turkey) and know everything about it." The use of "her boku" (every crap/stupid thing) is a very strong, informal, and negative way to express that they are exaggerating or fabricating their historical knowledge. It carries the implication that these people falsely believe they have a deep understanding of history and are placing importance on their (likely fabricated) role within it. It's a criticism of a perceived male-centric, and potentially inaccurate or inflated, view of history.