Original: King Rudolph I of Germany declares war on King Otakar II of Bohemia, a political rival; by November, Otakar II is forced to cede four important territories as demanded by the diet of Nuremberg in 1274.
Simplified: June - King Rudolph I of Germany starts a war with King Otakar II of Bohemia; by November, Otakar II has to give him four important pieces of land.