Quiz of History
https://quizofhistory.com/?qsm_quiz=geography-guesser-1-hard
https://quizofhistory.com/?qsm_quiz=flags-of-the-world-quiz-1
https://quizofhistory.com/?qsm_quiz=world-war-2-quiz-1
https://quizofhistory.com/?qsm_quiz=world-war-1-quiz-1