As the main action of the Paraguayan War took place far to the south, the Brazilian government sent an expedition overland to recapture the occupied province of Mato Grosso. This disastrous campaign was a roadshow of human misery that somehow became a legendary Brazilian epic, and also a great demonstration of why you should never ignore the Iron Hand of Logistics.

Sources: https://www.unknownsoldierspodcast.com/post/unknown-soldiers-podcast-episodes-47-51-the-paraguayan-war-series-sources

Map: https://www.unknownsoldierspodcast.com/post/the-paraguayan-war-part-3-5-the-retreat-from-laguna-a-brazilian-odyssey-map