In a war full of ridiculous screw ups, Churchill came in with one of the worst. Interesting to thing about what might have happened had it succeeded - given that the British resorted to plan b, "Lawrence of Arabia". That didn't turn out to well.
I always thought it was brave to the point of stupidity but if it had worked they could've made the Ottomans capitulate and reinforce and push up through the Balkans. The world would probably be very different.
Battle of the Crater - Wikipedia Union tries to end stalemate around Petersberg by blowing a literal crater in Rebel defenses , tactical follies and lack of confidence (good ol anti black racism) in Black Union formations leads to one of the more embarrassing routes of the war.
1990 airlift of Indians from Kuwait - Wikipedia government of India executes one of the most successful airlift campaigns in Aviation history to evacute her nationals from Iraqi occupied Kuwait
Quantum gravity - Wikipedia Possibly the greatest unsolved mystery in physics. We know how gravity works on a large scale (thanks to Einstein) which is why we can predict the motion of planets, stars, and galaxies. But nobody really knows how gravity works on a small scale or how small of a scale the rules of gravity still apply. Figuring this out is the key to understand what actually happens in a black hole and possibly what happened before the big bang.