By Sam Laskaris Writer The Six Nations Rivermen will travel to British Columbia later this month to battle for a national title. The Rivermen qualified for the Presidents Cup, the national Senior B tournament, on Sunday. The Six Nations squad downed the host Brooklin Merchants 8-7 in a match held at the Iroquois Park Sports Complex in Whitby. Rodd Squire scored the game-winning goal, a powerplay marker, with slightly more than two minutes remaining in the contest. With that victory the Rivermen won their best-of-five Ontario Series Lacrosse (OSL) championship series 3-1 over the Merchants. “It was a solid team effort,” said Rivermen head coach Wayne Hill, who is also the team president. “We were all pulling on the same rope.” The Merchants had won the series opener 13-11. But…